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Finding the Fourth Proportional to 290.01, 432.90 and 251.76

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Solution

The fourth proportional to 290.01, 432.90 and 251.76 is: 375.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    290.01 : 432.90 = 251.76 : x
  2. Step 2: Convert to fraction form
    290.01/432.90 = 251.76/x
  3. Step 3: Cross multiply
    290.01x = 432.90 × 251.76
  4. Step 4: Simplify right side
    290.01x = 108,986.90
  5. Step 5: Solve for x
    x = 108,986.90/290.01
  6. Step 6: Final answer
    x = 375.80

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.