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Finding the Fourth Proportional to 625,660, 862,455.36 and 383,493.76

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Solution

The fourth proportional to 625,660, 862,455.36 and 383,493.76 is: 528,635.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    625,660 : 862,455.36 = 383,493.76 : x
  2. Step 2: Convert to fraction form
    625,660/862,455.36 = 383,493.76/x
  3. Step 3: Cross multiply
    625,660x = 862,455.36 × 383,493.76
  4. Step 4: Simplify right side
    625,660x = 330,746,248,838.55
  5. Step 5: Solve for x
    x = 330,746,248,838.55/625,660
  6. Step 6: Final answer
    x = 528,635.76

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1.5x scale

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.