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Finding the Fourth Proportional to 922.97, 1,383.37 and 647.57

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Solution

The fourth proportional to 922.97, 1,383.37 and 647.57 is: 970.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    922.97 : 1,383.37 = 647.57 : x
  2. Step 2: Convert to fraction form
    922.97/1,383.37 = 647.57/x
  3. Step 3: Cross multiply
    922.97x = 1,383.37 × 647.57
  4. Step 4: Simplify right side
    922.97x = 895,828.91
  5. Step 5: Solve for x
    x = 895,828.91/922.97
  6. Step 6: Final answer
    x = 970.59

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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.