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Finding the Fourth Proportional to 407.25, 562.14 and 291.15

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Solution

The fourth proportional to 407.25, 562.14 and 291.15 is: 401.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    407.25 : 562.14 = 291.15 : x
  2. Step 2: Convert to fraction form
    407.25/562.14 = 291.15/x
  3. Step 3: Cross multiply
    407.25x = 562.14 × 291.15
  4. Step 4: Simplify right side
    407.25x = 163,667.06
  5. Step 5: Solve for x
    x = 163,667.06/407.25
  6. Step 6: Final answer
    x = 401.88

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