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Finding the Fourth Proportional to 708,787.33, 978,150.14 and 386,515.11

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Solution

The fourth proportional to 708,787.33, 978,150.14 and 386,515.11 is: 533,403.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,787.33 : 978,150.14 = 386,515.11 : x
  2. Step 2: Convert to fraction form
    708,787.33/978,150.14 = 386,515.11/x
  3. Step 3: Cross multiply
    708,787.33x = 978,150.14 × 386,515.11
  4. Step 4: Simplify right side
    708,787.33x = 378,069,808,958.62
  5. Step 5: Solve for x
    x = 378,069,808,958.62/708,787.33
  6. Step 6: Final answer
    x = 533,403.73

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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.