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Finding the Fourth Proportional to 1,082.57, 1,623.85 and 432.84

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Solution

The fourth proportional to 1,082.57, 1,623.85 and 432.84 is: 649.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,082.57 : 1,623.85 = 432.84 : x
  2. Step 2: Convert to fraction form
    1,082.57/1,623.85 = 432.84/x
  3. Step 3: Cross multiply
    1,082.57x = 1,623.85 × 432.84
  4. Step 4: Simplify right side
    1,082.57x = 702,872.24
  5. Step 5: Solve for x
    x = 702,872.24/1,082.57
  6. Step 6: Final answer
    x = 649.27

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.