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Finding the Fourth Proportional to 356.59, 532.99 and 253.18

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Solution

The fourth proportional to 356.59, 532.99 and 253.18 is: 378.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    356.59 : 532.99 = 253.18 : x
  2. Step 2: Convert to fraction form
    356.59/532.99 = 253.18/x
  3. Step 3: Cross multiply
    356.59x = 532.99 × 253.18
  4. Step 4: Simplify right side
    356.59x = 134,942.41
  5. Step 5: Solve for x
    x = 134,942.41/356.59
  6. Step 6: Final answer
    x = 378.42

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.