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Finding the Fourth Proportional to 275.47, 412.76 and 145.46

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Solution

The fourth proportional to 275.47, 412.76 and 145.46 is: 217.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    275.47 : 412.76 = 145.46 : x
  2. Step 2: Convert to fraction form
    275.47/412.76 = 145.46/x
  3. Step 3: Cross multiply
    275.47x = 412.76 × 145.46
  4. Step 4: Simplify right side
    275.47x = 60,039.34
  5. Step 5: Solve for x
    x = 60,039.34/275.47
  6. Step 6: Final answer
    x = 217.96

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.