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Finding the Fourth Proportional to 625,729.20, 863,510.40 and 339,253.68

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Solution

The fourth proportional to 625,729.20, 863,510.40 and 339,253.68 is: 468,172.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    625,729.20 : 863,510.40 = 339,253.68 : x
  2. Step 2: Convert to fraction form
    625,729.20/863,510.40 = 339,253.68/x
  3. Step 3: Cross multiply
    625,729.20x = 863,510.40 × 339,253.68
  4. Step 4: Simplify right side
    625,729.20x = 292,949,080,918.27
  5. Step 5: Solve for x
    x = 292,949,080,918.27/625,729.20
  6. Step 6: Final answer
    x = 468,172.30

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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.