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Finding the Fourth Proportional to 407.03, 561.65 and 267.18

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Solution

The fourth proportional to 407.03, 561.65 and 267.18 is: 368.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    407.03 : 561.65 = 267.18 : x
  2. Step 2: Convert to fraction form
    407.03/561.65 = 267.18/x
  3. Step 3: Cross multiply
    407.03x = 561.65 × 267.18
  4. Step 4: Simplify right side
    407.03x = 150,060.31
  5. Step 5: Solve for x
    x = 150,060.31/407.03
  6. Step 6: Final answer
    x = 368.68

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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.