Home / 520,919.20-781,378.80-165,930.40

Finding the Fourth Proportional to 520,919.20, 781,378.80 and 165,930.40

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Solution

The fourth proportional to 520,919.20, 781,378.80 and 165,930.40 is: 248,895.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,919.20 : 781,378.80 = 165,930.40 : x
  2. Step 2: Convert to fraction form
    520,919.20/781,378.80 = 165,930.40/x
  3. Step 3: Cross multiply
    520,919.20x = 781,378.80 × 165,930.40
  4. Step 4: Simplify right side
    520,919.20x = 129,654,496,835.52
  5. Step 5: Solve for x
    x = 129,654,496,835.52/520,919.20
  6. Step 6: Final answer
    x = 248,895.60

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Similar ratio
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1.5x scale

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.