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Finding the Fourth Proportional to 675.39, 1,013.18 and 242.45

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Solution

The fourth proportional to 675.39, 1,013.18 and 242.45 is: 363.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    675.39 : 1,013.18 = 242.45 : x
  2. Step 2: Convert to fraction form
    675.39/1,013.18 = 242.45/x
  3. Step 3: Cross multiply
    675.39x = 1,013.18 × 242.45
  4. Step 4: Simplify right side
    675.39x = 245,639.21
  5. Step 5: Solve for x
    x = 245,639.21/675.39
  6. Step 6: Final answer
    x = 363.70

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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.