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Finding the Fourth Proportional to 675.47, 1,005.55 and 671.82

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Solution

The fourth proportional to 675.47, 1,005.55 and 671.82 is: 1,000.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    675.47 : 1,005.55 = 671.82 : x
  2. Step 2: Convert to fraction form
    675.47/1,005.55 = 671.82/x
  3. Step 3: Cross multiply
    675.47x = 1,005.55 × 671.82
  4. Step 4: Simplify right side
    675.47x = 675,548.60
  5. Step 5: Solve for x
    x = 675,548.60/675.47
  6. Step 6: Final answer
    x = 1,000.12

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.