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Finding the Fourth Proportional to 968.97, 1,337.19 and 570.72

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Solution

The fourth proportional to 968.97, 1,337.19 and 570.72 is: 787.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    968.97 : 1,337.19 = 570.72 : x
  2. Step 2: Convert to fraction form
    968.97/1,337.19 = 570.72/x
  3. Step 3: Cross multiply
    968.97x = 1,337.19 × 570.72
  4. Step 4: Simplify right side
    968.97x = 763,161.08
  5. Step 5: Solve for x
    x = 763,161.08/968.97
  6. Step 6: Final answer
    x = 787.60

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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.