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Finding the Fourth Proportional to 971.29, 1,340.28 and 572.94

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Solution

The fourth proportional to 971.29, 1,340.28 and 572.94 is: 790.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    971.29 : 1,340.28 = 572.94 : x
  2. Step 2: Convert to fraction form
    971.29/1,340.28 = 572.94/x
  3. Step 3: Cross multiply
    971.29x = 1,340.28 × 572.94
  4. Step 4: Simplify right side
    971.29x = 767,900.02
  5. Step 5: Solve for x
    x = 767,900.02/971.29
  6. Step 6: Final answer
    x = 790.60

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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.