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Finding the Fourth Proportional to 929.96, 1,395 and 271.92

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Solution

The fourth proportional to 929.96, 1,395 and 271.92 is: 407.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    929.96 : 1,395 = 271.92 : x
  2. Step 2: Convert to fraction form
    929.96/1,395 = 271.92/x
  3. Step 3: Cross multiply
    929.96x = 1,395 × 271.92
  4. Step 4: Simplify right side
    929.96x = 379,328.40
  5. Step 5: Solve for x
    x = 379,328.40/929.96
  6. Step 6: Final answer
    x = 407.90

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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.