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Finding the Fourth Proportional to 521,253.64, 718,959.13 and 478,371.64

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Solution

The fourth proportional to 521,253.64, 718,959.13 and 478,371.64 is: 659,812.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,253.64 : 718,959.13 = 478,371.64 : x
  2. Step 2: Convert to fraction form
    521,253.64/718,959.13 = 478,371.64/x
  3. Step 3: Cross multiply
    521,253.64x = 718,959.13 × 478,371.64
  4. Step 4: Simplify right side
    521,253.64x = 343,929,657,309.64
  5. Step 5: Solve for x
    x = 343,929,657,309.64/521,253.64
  6. Step 6: Final answer
    x = 659,812.48

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.