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Finding the Fourth Proportional to 520,906.65, 781,359.98 and 320,577.45

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Solution

The fourth proportional to 520,906.65, 781,359.98 and 320,577.45 is: 480,866.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,906.65 : 781,359.98 = 320,577.45 : x
  2. Step 2: Convert to fraction form
    520,906.65/781,359.98 = 320,577.45/x
  3. Step 3: Cross multiply
    520,906.65x = 781,359.98 × 320,577.45
  4. Step 4: Simplify right side
    520,906.65x = 250,486,388,317.56
  5. Step 5: Solve for x
    x = 250,486,388,317.56/520,906.65
  6. Step 6: Final answer
    x = 480,866.18

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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.