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Finding the Fourth Proportional to 625,889.90, 863,728.29 and 339,409.91

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Solution

The fourth proportional to 625,889.90, 863,728.29 and 339,409.91 is: 468,385.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    625,889.90 : 863,728.29 = 339,409.91 : x
  2. Step 2: Convert to fraction form
    625,889.90/863,728.29 = 339,409.91/x
  3. Step 3: Cross multiply
    625,889.90x = 863,728.29 × 339,409.91
  4. Step 4: Simplify right side
    625,889.90x = 293,157,936,854.71
  5. Step 5: Solve for x
    x = 293,157,936,854.71/625,889.90
  6. Step 6: Final answer
    x = 468,385.80

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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.