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Finding the Fourth Proportional to 386,471.60, 579,966.60 and 228,532.40

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Solution

The fourth proportional to 386,471.60, 579,966.60 and 228,532.40 is: 342,951.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,471.60 : 579,966.60 = 228,532.40 : x
  2. Step 2: Convert to fraction form
    386,471.60/579,966.60 = 228,532.40/x
  3. Step 3: Cross multiply
    386,471.60x = 579,966.60 × 228,532.40
  4. Step 4: Simplify right side
    386,471.60x = 132,541,159,017.84
  5. Step 5: Solve for x
    x = 132,541,159,017.84/386,471.60
  6. Step 6: Final answer
    x = 342,951.87

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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.