Home / 1,213.01-1,819.68-391.28

Finding the Fourth Proportional to 1,213.01, 1,819.68 and 391.28

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Solution

The fourth proportional to 1,213.01, 1,819.68 and 391.28 is: 586.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,213.01 : 1,819.68 = 391.28 : x
  2. Step 2: Convert to fraction form
    1,213.01/1,819.68 = 391.28/x
  3. Step 3: Cross multiply
    1,213.01x = 1,819.68 × 391.28
  4. Step 4: Simplify right side
    1,213.01x = 712,008.94
  5. Step 5: Solve for x
    x = 712,008.94/1,213.01
  6. Step 6: Final answer
    x = 586.98

Related Problems

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Half scale
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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.