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Finding the Fourth Proportional to 290.32, 432.57 and 272.08

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Solution

The fourth proportional to 290.32, 432.57 and 272.08 is: 405.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    290.32 : 432.57 = 272.08 : x
  2. Step 2: Convert to fraction form
    290.32/432.57 = 272.08/x
  3. Step 3: Cross multiply
    290.32x = 432.57 × 272.08
  4. Step 4: Simplify right side
    290.32x = 117,693.65
  5. Step 5: Solve for x
    x = 117,693.65/290.32
  6. Step 6: Final answer
    x = 405.39

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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.