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Finding the Fourth Proportional to 675.76, 1,013.56 and 188.76

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Solution

The fourth proportional to 675.76, 1,013.56 and 188.76 is: 283.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    675.76 : 1,013.56 = 188.76 : x
  2. Step 2: Convert to fraction form
    675.76/1,013.56 = 188.76/x
  3. Step 3: Cross multiply
    675.76x = 1,013.56 × 188.76
  4. Step 4: Simplify right side
    675.76x = 191,319.59
  5. Step 5: Solve for x
    x = 191,319.59/675.76
  6. Step 6: Final answer
    x = 283.12

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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.