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Finding the Fourth Proportional to 676,513.92, 933,361.74 and 390,027.72

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Solution

The fourth proportional to 676,513.92, 933,361.74 and 390,027.72 is: 538,107.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    676,513.92 : 933,361.74 = 390,027.72 : x
  2. Step 2: Convert to fraction form
    676,513.92/933,361.74 = 390,027.72/x
  3. Step 3: Cross multiply
    676,513.92x = 933,361.74 × 390,027.72
  4. Step 4: Simplify right side
    676,513.92x = 364,036,951,387.43
  5. Step 5: Solve for x
    x = 364,036,951,387.43/676,513.92
  6. Step 6: Final answer
    x = 538,107.11

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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.