Home / 640,043,123.60-960,064,685.40-478,799,987.60

Finding the Fourth Proportional to 640,043,123.60, 960,064,685.40 and 478,799,987.60

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Solution

The fourth proportional to 640,043,123.60, 960,064,685.40 and 478,799,987.60 is: 718,199,981.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,043,123.60 : 960,064,685.40 = 478,799,987.60 : x
  2. Step 2: Convert to fraction form
    640,043,123.60/960,064,685.40 = 478,799,987.60/x
  3. Step 3: Cross multiply
    640,043,123.60x = 960,064,685.40 × 478,799,987.60
  4. Step 4: Simplify right side
    640,043,123.60x = 459,678,959,464,717,888
  5. Step 5: Solve for x
    x = 459,678,959,464,717,888/640,043,123.60
  6. Step 6: Final answer
    x = 718,199,981.40

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.