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Finding the Fourth Proportional to 625,909.28, 863,739.60 and 357,620

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Solution

The fourth proportional to 625,909.28, 863,739.60 and 357,620 is: 493,506.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    625,909.28 : 863,739.60 = 357,620 : x
  2. Step 2: Convert to fraction form
    625,909.28/863,739.60 = 357,620/x
  3. Step 3: Cross multiply
    625,909.28x = 863,739.60 × 357,620
  4. Step 4: Simplify right side
    625,909.28x = 308,890,555,752
  5. Step 5: Solve for x
    x = 308,890,555,752/625,909.28
  6. Step 6: Final answer
    x = 493,506.91

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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.