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Finding the Fourth Proportional to 625,367.12, 863,007.80 and 338,887.40

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Solution

The fourth proportional to 625,367.12, 863,007.80 and 338,887.40 is: 467,665.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    625,367.12 : 863,007.80 = 338,887.40 : x
  2. Step 2: Convert to fraction form
    625,367.12/863,007.80 = 338,887.40/x
  3. Step 3: Cross multiply
    625,367.12x = 863,007.80 × 338,887.40
  4. Step 4: Simplify right side
    625,367.12x = 292,462,469,521.72
  5. Step 5: Solve for x
    x = 292,462,469,521.72/625,367.12
  6. Step 6: Final answer
    x = 467,665.25

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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.