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Finding the Fourth Proportional to 356.16, 489.96 and 296.76

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Solution

The fourth proportional to 356.16, 489.96 and 296.76 is: 408.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    356.16 : 489.96 = 296.76 : x
  2. Step 2: Convert to fraction form
    356.16/489.96 = 296.76/x
  3. Step 3: Cross multiply
    356.16x = 489.96 × 296.76
  4. Step 4: Simplify right side
    356.16x = 145,400.53
  5. Step 5: Solve for x
    x = 145,400.53/356.16
  6. Step 6: Final answer
    x = 408.24

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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.