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Finding the Fourth Proportional to 974.02, 1,344.41 and 620

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Solution

The fourth proportional to 974.02, 1,344.41 and 620 is: 855.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    974.02 : 1,344.41 = 620 : x
  2. Step 2: Convert to fraction form
    974.02/1,344.41 = 620/x
  3. Step 3: Cross multiply
    974.02x = 1,344.41 × 620
  4. Step 4: Simplify right side
    974.02x = 833,534.20
  5. Step 5: Solve for x
    x = 833,534.20/974.02
  6. Step 6: Final answer
    x = 855.77

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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.