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Finding the Fourth Proportional to 612,200.10, 918,737.55 and 257,468.70

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Solution

The fourth proportional to 612,200.10, 918,737.55 and 257,468.70 is: 386,387.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,200.10 : 918,737.55 = 257,468.70 : x
  2. Step 2: Convert to fraction form
    612,200.10/918,737.55 = 257,468.70/x
  3. Step 3: Cross multiply
    612,200.10x = 918,737.55 × 257,468.70
  4. Step 4: Simplify right side
    612,200.10x = 236,546,162,639.69
  5. Step 5: Solve for x
    x = 236,546,162,639.69/612,200.10
  6. Step 6: Final answer
    x = 386,387.00

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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.