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Finding the Fourth Proportional to 577,148.40, 865,722.60 and 478,844.40

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Solution

The fourth proportional to 577,148.40, 865,722.60 and 478,844.40 is: 718,266.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    577,148.40 : 865,722.60 = 478,844.40 : x
  2. Step 2: Convert to fraction form
    577,148.40/865,722.60 = 478,844.40/x
  3. Step 3: Cross multiply
    577,148.40x = 865,722.60 × 478,844.40
  4. Step 4: Simplify right side
    577,148.40x = 414,546,418,963.44
  5. Step 5: Solve for x
    x = 414,546,418,963.44/577,148.40
  6. Step 6: Final answer
    x = 718,266.60

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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.