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Finding the Fourth Proportional to 411.16, 567.20 and 253.66

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Solution

The fourth proportional to 411.16, 567.20 and 253.66 is: 349.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    411.16 : 567.20 = 253.66 : x
  2. Step 2: Convert to fraction form
    411.16/567.20 = 253.66/x
  3. Step 3: Cross multiply
    411.16x = 567.20 × 253.66
  4. Step 4: Simplify right side
    411.16x = 143,875.95
  5. Step 5: Solve for x
    x = 143,875.95/411.16
  6. Step 6: Final answer
    x = 349.93

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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.