Home / 640,043,122.60-960,064,683.90-478,799,986.60

Finding the Fourth Proportional to 640,043,122.60, 960,064,683.90 and 478,799,986.60

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Solution

The fourth proportional to 640,043,122.60, 960,064,683.90 and 478,799,986.60 is: 718,199,979.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,043,122.60 : 960,064,683.90 = 478,799,986.60 : x
  2. Step 2: Convert to fraction form
    640,043,122.60/960,064,683.90 = 478,799,986.60/x
  3. Step 3: Cross multiply
    640,043,122.60x = 960,064,683.90 × 478,799,986.60
  4. Step 4: Simplify right side
    640,043,122.60x = 459,678,957,786,453,248
  5. Step 5: Solve for x
    x = 459,678,957,786,453,248/640,043,122.60
  6. Step 6: Final answer
    x = 718,199,979.90

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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.