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Finding the Fourth Proportional to 482.40, 723.56 and 140.40

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Solution

The fourth proportional to 482.40, 723.56 and 140.40 is: 210.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    482.40 : 723.56 = 140.40 : x
  2. Step 2: Convert to fraction form
    482.40/723.56 = 140.40/x
  3. Step 3: Cross multiply
    482.40x = 723.56 × 140.40
  4. Step 4: Simplify right side
    482.40x = 101,587.82
  5. Step 5: Solve for x
    x = 101,587.82/482.40
  6. Step 6: Final answer
    x = 210.59

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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.