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Finding the Fourth Proportional to 521,166.80, 781,750.20 and 355,278.80

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Solution

The fourth proportional to 521,166.80, 781,750.20 and 355,278.80 is: 532,918.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,166.80 : 781,750.20 = 355,278.80 : x
  2. Step 2: Convert to fraction form
    521,166.80/781,750.20 = 355,278.80/x
  3. Step 3: Cross multiply
    521,166.80x = 781,750.20 × 355,278.80
  4. Step 4: Simplify right side
    521,166.80x = 277,739,272,955.76
  5. Step 5: Solve for x
    x = 277,739,272,955.76/521,166.80
  6. Step 6: Final answer
    x = 532,918.20

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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.