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Finding the Fourth Proportional to 449.19, 619.80 and 291.84

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Solution

The fourth proportional to 449.19, 619.80 and 291.84 is: 402.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    449.19 : 619.80 = 291.84 : x
  2. Step 2: Convert to fraction form
    449.19/619.80 = 291.84/x
  3. Step 3: Cross multiply
    449.19x = 619.80 × 291.84
  4. Step 4: Simplify right side
    449.19x = 180,882.43
  5. Step 5: Solve for x
    x = 180,882.43/449.19
  6. Step 6: Final answer
    x = 402.69

Related Problems

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Half scale
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Double scale
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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.