Home / 811,892.70-1,217,839.05-391,211.10

Finding the Fourth Proportional to 811,892.70, 1,217,839.05 and 391,211.10

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Solution

The fourth proportional to 811,892.70, 1,217,839.05 and 391,211.10 is: 586,816.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,892.70 : 1,217,839.05 = 391,211.10 : x
  2. Step 2: Convert to fraction form
    811,892.70/1,217,839.05 = 391,211.10/x
  3. Step 3: Cross multiply
    811,892.70x = 1,217,839.05 × 391,211.10
  4. Step 4: Simplify right side
    811,892.70x = 476,432,154,373.46
  5. Step 5: Solve for x
    x = 476,432,154,373.46/811,892.70
  6. Step 6: Final answer
    x = 586,816.65

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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.