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Finding the Fourth Proportional to 625,178, 862,763.28 and 353,257.40

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Solution

The fourth proportional to 625,178, 862,763.28 and 353,257.40 is: 487,505.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    625,178 : 862,763.28 = 353,257.40 : x
  2. Step 2: Convert to fraction form
    625,178/862,763.28 = 353,257.40/x
  3. Step 3: Cross multiply
    625,178x = 862,763.28 × 353,257.40
  4. Step 4: Simplify right side
    625,178x = 304,777,513,108.27
  5. Step 5: Solve for x
    x = 304,777,513,108.27/625,178
  6. Step 6: Final answer
    x = 487,505.18

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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.