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Finding the Fourth Proportional to 370.31, 510.92 and 228.57

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Solution

The fourth proportional to 370.31, 510.92 and 228.57 is: 315.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    370.31 : 510.92 = 228.57 : x
  2. Step 2: Convert to fraction form
    370.31/510.92 = 228.57/x
  3. Step 3: Cross multiply
    370.31x = 510.92 × 228.57
  4. Step 4: Simplify right side
    370.31x = 116,781.76
  5. Step 5: Solve for x
    x = 116,781.76/370.31
  6. Step 6: Final answer
    x = 315.36

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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.