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Finding the Fourth Proportional to 438,312.70, 658,246.65 and 338,715.10

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Solution

The fourth proportional to 438,312.70, 658,246.65 and 338,715.10 is: 508,673.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,312.70 : 658,246.65 = 338,715.10 : x
  2. Step 2: Convert to fraction form
    438,312.70/658,246.65 = 338,715.10/x
  3. Step 3: Cross multiply
    438,312.70x = 658,246.65 × 338,715.10
  4. Step 4: Simplify right side
    438,312.70x = 222,958,079,879.42
  5. Step 5: Solve for x
    x = 222,958,079,879.42/438,312.70
  6. Step 6: Final answer
    x = 508,673.56

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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.