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Finding the Fourth Proportional to 520,445.86, 780,890.22 and 220,990.88

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Solution

The fourth proportional to 520,445.86, 780,890.22 and 220,990.88 is: 331,580.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,445.86 : 780,890.22 = 220,990.88 : x
  2. Step 2: Convert to fraction form
    520,445.86/780,890.22 = 220,990.88/x
  3. Step 3: Cross multiply
    520,445.86x = 780,890.22 × 220,990.88
  4. Step 4: Simplify right side
    520,445.86x = 172,569,618,853.42
  5. Step 5: Solve for x
    x = 172,569,618,853.42/520,445.86
  6. Step 6: Final answer
    x = 331,580.35

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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.