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Finding the Fourth Proportional to 977.28, 1,348.67 and 604.28

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Solution

The fourth proportional to 977.28, 1,348.67 and 604.28 is: 833.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    977.28 : 1,348.67 = 604.28 : x
  2. Step 2: Convert to fraction form
    977.28/1,348.67 = 604.28/x
  3. Step 3: Cross multiply
    977.28x = 1,348.67 × 604.28
  4. Step 4: Simplify right side
    977.28x = 814,964.54
  5. Step 5: Solve for x
    x = 814,964.54/977.28
  6. Step 6: Final answer
    x = 833.91

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.