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Finding the Fourth Proportional to 625,318.10, 862,606.18 and 380,377.74

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Solution

The fourth proportional to 625,318.10, 862,606.18 and 380,377.74 is: 524,718.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    625,318.10 : 862,606.18 = 380,377.74 : x
  2. Step 2: Convert to fraction form
    625,318.10/862,606.18 = 380,377.74/x
  3. Step 3: Cross multiply
    625,318.10x = 862,606.18 × 380,377.74
  4. Step 4: Simplify right side
    625,318.10x = 328,116,188,307.49
  5. Step 5: Solve for x
    x = 328,116,188,307.49/625,318.10
  6. Step 6: Final answer
    x = 524,718.84

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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.