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Finding the Fourth Proportional to 1,581.47, 2,372.21 and 554.75

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Solution

The fourth proportional to 1,581.47, 2,372.21 and 554.75 is: 832.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,581.47 : 2,372.21 = 554.75 : x
  2. Step 2: Convert to fraction form
    1,581.47/2,372.21 = 554.75/x
  3. Step 3: Cross multiply
    1,581.47x = 2,372.21 × 554.75
  4. Step 4: Simplify right side
    1,581.47x = 1,315,983.50
  5. Step 5: Solve for x
    x = 1,315,983.50/1,581.47
  6. Step 6: Final answer
    x = 832.13

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.