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Finding the Fourth Proportional to 577,143.40, 865,715.10 and 478,839.40

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Solution

The fourth proportional to 577,143.40, 865,715.10 and 478,839.40 is: 718,259.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    577,143.40 : 865,715.10 = 478,839.40 : x
  2. Step 2: Convert to fraction form
    577,143.40/865,715.10 = 478,839.40/x
  3. Step 3: Cross multiply
    577,143.40x = 865,715.10 × 478,839.40
  4. Step 4: Simplify right side
    577,143.40x = 414,538,499,054.94
  5. Step 5: Solve for x
    x = 414,538,499,054.94/577,143.40
  6. Step 6: Final answer
    x = 718,259.10

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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.