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Finding the Fourth Proportional to 718,231.68, 991,159.47 and 395,947.26

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Solution

The fourth proportional to 718,231.68, 991,159.47 and 395,947.26 is: 546,407.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,231.68 : 991,159.47 = 395,947.26 : x
  2. Step 2: Convert to fraction form
    718,231.68/991,159.47 = 395,947.26/x
  3. Step 3: Cross multiply
    718,231.68x = 991,159.47 × 395,947.26
  4. Step 4: Simplify right side
    718,231.68x = 392,446,876,369.55
  5. Step 5: Solve for x
    x = 392,446,876,369.55/718,231.68
  6. Step 6: Final answer
    x = 546,407.08

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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.