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Finding the Fourth Proportional to 974.90, 1,344.66 and 581.66

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Solution

The fourth proportional to 974.90, 1,344.66 and 581.66 is: 802.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    974.90 : 1,344.66 = 581.66 : x
  2. Step 2: Convert to fraction form
    974.90/1,344.66 = 581.66/x
  3. Step 3: Cross multiply
    974.90x = 1,344.66 × 581.66
  4. Step 4: Simplify right side
    974.90x = 782,134.94
  5. Step 5: Solve for x
    x = 782,134.94/974.90
  6. Step 6: Final answer
    x = 802.27

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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.