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Finding the Fourth Proportional to 363,699.30, 502,039.71 and 312,507.30

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Solution

The fourth proportional to 363,699.30, 502,039.71 and 312,507.30 is: 431,375.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    363,699.30 : 502,039.71 = 312,507.30 : x
  2. Step 2: Convert to fraction form
    363,699.30/502,039.71 = 312,507.30/x
  3. Step 3: Cross multiply
    363,699.30x = 502,039.71 × 312,507.30
  4. Step 4: Simplify right side
    363,699.30x = 156,891,074,264.88
  5. Step 5: Solve for x
    x = 156,891,074,264.88/363,699.30
  6. Step 6: Final answer
    x = 431,375.79

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1.5x scale

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.