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Finding the Fourth Proportional to 675.52, 1,013.58 and 646.36

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Solution

The fourth proportional to 675.52, 1,013.58 and 646.36 is: 969.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    675.52 : 1,013.58 = 646.36 : x
  2. Step 2: Convert to fraction form
    675.52/1,013.58 = 646.36/x
  3. Step 3: Cross multiply
    675.52x = 1,013.58 × 646.36
  4. Step 4: Simplify right side
    675.52x = 655,137.57
  5. Step 5: Solve for x
    x = 655,137.57/675.52
  6. Step 6: Final answer
    x = 969.83

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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.