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Finding the Fourth Proportional to 356.40, 531.12 and 344.88

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Solution

The fourth proportional to 356.40, 531.12 and 344.88 is: 513.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    356.40 : 531.12 = 344.88 : x
  2. Step 2: Convert to fraction form
    356.40/531.12 = 344.88/x
  3. Step 3: Cross multiply
    356.40x = 531.12 × 344.88
  4. Step 4: Simplify right side
    356.40x = 183,172.67
  5. Step 5: Solve for x
    x = 183,172.67/356.40
  6. Step 6: Final answer
    x = 513.95

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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.