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Finding the Fourth Proportional to 521,708.70, 782,563.05 and 255,510.30

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Solution

The fourth proportional to 521,708.70, 782,563.05 and 255,510.30 is: 383,265.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,708.70 : 782,563.05 = 255,510.30 : x
  2. Step 2: Convert to fraction form
    521,708.70/782,563.05 = 255,510.30/x
  3. Step 3: Cross multiply
    521,708.70x = 782,563.05 × 255,510.30
  4. Step 4: Simplify right side
    521,708.70x = 199,952,919,674.42
  5. Step 5: Solve for x
    x = 199,952,919,674.42/521,708.70
  6. Step 6: Final answer
    x = 383,265.45

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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.