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Finding the Fourth Proportional to 520,304.80, 781,040.40 and 402,498.40

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Solution

The fourth proportional to 520,304.80, 781,040.40 and 402,498.40 is: 604,198.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,304.80 : 781,040.40 = 402,498.40 : x
  2. Step 2: Convert to fraction form
    520,304.80/781,040.40 = 402,498.40/x
  3. Step 3: Cross multiply
    520,304.80x = 781,040.40 × 402,498.40
  4. Step 4: Simplify right side
    520,304.80x = 314,367,511,335.36
  5. Step 5: Solve for x
    x = 314,367,511,335.36/520,304.80
  6. Step 6: Final answer
    x = 604,198.75

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.