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Finding the Fourth Proportional to 625,278.98, 863,182.50 and 418,902.72

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Solution

The fourth proportional to 625,278.98, 863,182.50 and 418,902.72 is: 578,285.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    625,278.98 : 863,182.50 = 418,902.72 : x
  2. Step 2: Convert to fraction form
    625,278.98/863,182.50 = 418,902.72/x
  3. Step 3: Cross multiply
    625,278.98x = 863,182.50 × 418,902.72
  4. Step 4: Simplify right side
    625,278.98x = 361,589,497,106.40
  5. Step 5: Solve for x
    x = 361,589,497,106.40/625,278.98
  6. Step 6: Final answer
    x = 578,285.07

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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.