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Finding the Fourth Proportional to 257,672.40, 386,328.60 and 152,437.20

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Solution

The fourth proportional to 257,672.40, 386,328.60 and 152,437.20 is: 228,549.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,672.40 : 386,328.60 = 152,437.20 : x
  2. Step 2: Convert to fraction form
    257,672.40/386,328.60 = 152,437.20/x
  3. Step 3: Cross multiply
    257,672.40x = 386,328.60 × 152,437.20
  4. Step 4: Simplify right side
    257,672.40x = 58,890,850,063.92
  5. Step 5: Solve for x
    x = 58,890,850,063.92/257,672.40
  6. Step 6: Final answer
    x = 228,549.31

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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.