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Finding the Fourth Proportional to 356.47, 534.95 and 140.07

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Solution

The fourth proportional to 356.47, 534.95 and 140.07 is: 210.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    356.47 : 534.95 = 140.07 : x
  2. Step 2: Convert to fraction form
    356.47/534.95 = 140.07/x
  3. Step 3: Cross multiply
    356.47x = 534.95 × 140.07
  4. Step 4: Simplify right side
    356.47x = 74,930.45
  5. Step 5: Solve for x
    x = 74,930.45/356.47
  6. Step 6: Final answer
    x = 210.20

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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.