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Finding the Fourth Proportional to 356.78, 534.58 and 140.24

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Solution

The fourth proportional to 356.78, 534.58 and 140.24 is: 210.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    356.78 : 534.58 = 140.24 : x
  2. Step 2: Convert to fraction form
    356.78/534.58 = 140.24/x
  3. Step 3: Cross multiply
    356.78x = 534.58 × 140.24
  4. Step 4: Simplify right side
    356.78x = 74,969.50
  5. Step 5: Solve for x
    x = 74,969.50/356.78
  6. Step 6: Final answer
    x = 210.13

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.