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Finding the Fourth Proportional to 407,741.80, 611,612.70 and 371,000.20

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Solution

The fourth proportional to 407,741.80, 611,612.70 and 371,000.20 is: 556,500.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,741.80 : 611,612.70 = 371,000.20 : x
  2. Step 2: Convert to fraction form
    407,741.80/611,612.70 = 371,000.20/x
  3. Step 3: Cross multiply
    407,741.80x = 611,612.70 × 371,000.20
  4. Step 4: Simplify right side
    407,741.80x = 226,908,434,022.54
  5. Step 5: Solve for x
    x = 226,908,434,022.54/407,741.80
  6. Step 6: Final answer
    x = 556,500.30

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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.