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Finding the Fourth Proportional to 290.08, 432.62 and 281.20

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Solution

The fourth proportional to 290.08, 432.62 and 281.20 is: 419.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    290.08 : 432.62 = 281.20 : x
  2. Step 2: Convert to fraction form
    290.08/432.62 = 281.20/x
  3. Step 3: Cross multiply
    290.08x = 432.62 × 281.20
  4. Step 4: Simplify right side
    290.08x = 121,652.74
  5. Step 5: Solve for x
    x = 121,652.74/290.08
  6. Step 6: Final answer
    x = 419.38

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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.