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Finding the Fourth Proportional to 354.32, 489.12 and 237.68

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Solution

The fourth proportional to 354.32, 489.12 and 237.68 is: 328.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    354.32 : 489.12 = 237.68 : x
  2. Step 2: Convert to fraction form
    354.32/489.12 = 237.68/x
  3. Step 3: Cross multiply
    354.32x = 489.12 × 237.68
  4. Step 4: Simplify right side
    354.32x = 116,254.04
  5. Step 5: Solve for x
    x = 116,254.04/354.32
  6. Step 6: Final answer
    x = 328.10

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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.