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Finding the Fourth Proportional to 521,169.80, 781,754.70 and 355,281.80

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Solution

The fourth proportional to 521,169.80, 781,754.70 and 355,281.80 is: 532,922.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,169.80 : 781,754.70 = 355,281.80 : x
  2. Step 2: Convert to fraction form
    521,169.80/781,754.70 = 355,281.80/x
  3. Step 3: Cross multiply
    521,169.80x = 781,754.70 × 355,281.80
  4. Step 4: Simplify right side
    521,169.80x = 277,743,216,974.46
  5. Step 5: Solve for x
    x = 277,743,216,974.46/521,169.80
  6. Step 6: Final answer
    x = 532,922.70

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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.