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Finding the Fourth Proportional to 520,674.30, 781,011.45 and 165,724.20

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Solution

The fourth proportional to 520,674.30, 781,011.45 and 165,724.20 is: 248,586.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,674.30 : 781,011.45 = 165,724.20 : x
  2. Step 2: Convert to fraction form
    520,674.30/781,011.45 = 165,724.20/x
  3. Step 3: Cross multiply
    520,674.30x = 781,011.45 × 165,724.20
  4. Step 4: Simplify right side
    520,674.30x = 129,432,497,742.09
  5. Step 5: Solve for x
    x = 129,432,497,742.09/520,674.30
  6. Step 6: Final answer
    x = 248,586.30

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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.