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Finding the Fourth Proportional to 977.36, 1,348.68 and 584.24

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Solution

The fourth proportional to 977.36, 1,348.68 and 584.24 is: 806.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    977.36 : 1,348.68 = 584.24 : x
  2. Step 2: Convert to fraction form
    977.36/1,348.68 = 584.24/x
  3. Step 3: Cross multiply
    977.36x = 1,348.68 × 584.24
  4. Step 4: Simplify right side
    977.36x = 787,952.80
  5. Step 5: Solve for x
    x = 787,952.80/977.36
  6. Step 6: Final answer
    x = 806.21

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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.