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Finding the Fourth Proportional to 415.70, 573.68 and 291.39

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Solution

The fourth proportional to 415.70, 573.68 and 291.39 is: 402.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    415.70 : 573.68 = 291.39 : x
  2. Step 2: Convert to fraction form
    415.70/573.68 = 291.39/x
  3. Step 3: Cross multiply
    415.70x = 573.68 × 291.39
  4. Step 4: Simplify right side
    415.70x = 167,163.16
  5. Step 5: Solve for x
    x = 167,163.16/415.70
  6. Step 6: Final answer
    x = 402.13

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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.