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Finding the Fourth Proportional to 520,908.80, 781,363.20 and 165,958.70

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Solution

The fourth proportional to 520,908.80, 781,363.20 and 165,958.70 is: 248,938.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,908.80 : 781,363.20 = 165,958.70 : x
  2. Step 2: Convert to fraction form
    520,908.80/781,363.20 = 165,958.70/x
  3. Step 3: Cross multiply
    520,908.80x = 781,363.20 × 165,958.70
  4. Step 4: Simplify right side
    520,908.80x = 129,674,020,899.84
  5. Step 5: Solve for x
    x = 129,674,020,899.84/520,908.80
  6. Step 6: Final answer
    x = 248,938.05

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Double scale
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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.