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Finding the Fourth Proportional to 708,865.60, 978,233.92 and 386,576.32

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Solution

The fourth proportional to 708,865.60, 978,233.92 and 386,576.32 is: 533,474.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,865.60 : 978,233.92 = 386,576.32 : x
  2. Step 2: Convert to fraction form
    708,865.60/978,233.92 = 386,576.32/x
  3. Step 3: Cross multiply
    708,865.60x = 978,233.92 × 386,576.32
  4. Step 4: Simplify right side
    708,865.60x = 378,162,068,892.77
  5. Step 5: Solve for x
    x = 378,162,068,892.77/708,865.60
  6. Step 6: Final answer
    x = 533,474.99

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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.