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Finding the Fourth Proportional to 663,135.60, 915,148.08 and 376,638.60

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Solution

The fourth proportional to 663,135.60, 915,148.08 and 376,638.60 is: 519,773.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,135.60 : 915,148.08 = 376,638.60 : x
  2. Step 2: Convert to fraction form
    663,135.60/915,148.08 = 376,638.60/x
  3. Step 3: Cross multiply
    663,135.60x = 915,148.08 × 376,638.60
  4. Step 4: Simplify right side
    663,135.60x = 344,680,091,643.89
  5. Step 5: Solve for x
    x = 344,680,091,643.89/663,135.60
  6. Step 6: Final answer
    x = 519,773.17

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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.