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Finding the Fourth Proportional to 663,431.90, 994,558.67 and 258,530.32

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Solution

The fourth proportional to 663,431.90, 994,558.67 and 258,530.32 is: 387,565.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,431.90 : 994,558.67 = 258,530.32 : x
  2. Step 2: Convert to fraction form
    663,431.90/994,558.67 = 258,530.32/x
  3. Step 3: Cross multiply
    663,431.90x = 994,558.67 × 258,530.32
  4. Step 4: Simplify right side
    663,431.90x = 257,123,564,948.43
  5. Step 5: Solve for x
    x = 257,123,564,948.43/663,431.90
  6. Step 6: Final answer
    x = 387,565.88

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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.