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Finding the Fourth Proportional to 407.75, 562.50 and 267.81

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Solution

The fourth proportional to 407.75, 562.50 and 267.81 is: 369.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    407.75 : 562.50 = 267.81 : x
  2. Step 2: Convert to fraction form
    407.75/562.50 = 267.81/x
  3. Step 3: Cross multiply
    407.75x = 562.50 × 267.81
  4. Step 4: Simplify right side
    407.75x = 150,643.13
  5. Step 5: Solve for x
    x = 150,643.13/407.75
  6. Step 6: Final answer
    x = 369.45

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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.