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Finding the Fourth Proportional to 643,502.80, 965,254.20 and 539,304.40

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Solution

The fourth proportional to 643,502.80, 965,254.20 and 539,304.40 is: 808,956.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,502.80 : 965,254.20 = 539,304.40 : x
  2. Step 2: Convert to fraction form
    643,502.80/965,254.20 = 539,304.40/x
  3. Step 3: Cross multiply
    643,502.80x = 965,254.20 × 539,304.40
  4. Step 4: Simplify right side
    643,502.80x = 520,565,837,178.48
  5. Step 5: Solve for x
    x = 520,565,837,178.48/643,502.80
  6. Step 6: Final answer
    x = 808,956.60

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Similar ratio
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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.