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Finding the Fourth Proportional to 407.90, 562.95 and 242.16

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Solution

The fourth proportional to 407.90, 562.95 and 242.16 is: 334.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    407.90 : 562.95 = 242.16 : x
  2. Step 2: Convert to fraction form
    407.90/562.95 = 242.16/x
  3. Step 3: Cross multiply
    407.90x = 562.95 × 242.16
  4. Step 4: Simplify right side
    407.90x = 136,321.86
  5. Step 5: Solve for x
    x = 136,321.86/407.90
  6. Step 6: Final answer
    x = 334.20

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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.