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Finding the Fourth Proportional to 438,974.32, 657,774.60 and 339,379.96

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Solution

The fourth proportional to 438,974.32, 657,774.60 and 339,379.96 is: 508,538.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,974.32 : 657,774.60 = 339,379.96 : x
  2. Step 2: Convert to fraction form
    438,974.32/657,774.60 = 339,379.96/x
  3. Step 3: Cross multiply
    438,974.32x = 657,774.60 × 339,379.96
  4. Step 4: Simplify right side
    438,974.32x = 223,235,517,437.02
  5. Step 5: Solve for x
    x = 223,235,517,437.02/438,974.32
  6. Step 6: Final answer
    x = 508,538.90

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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.