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Finding the Fourth Proportional to 971.29, 1,340.39 and 529.20

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Solution

The fourth proportional to 971.29, 1,340.39 and 529.20 is: 730.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    971.29 : 1,340.39 = 529.20 : x
  2. Step 2: Convert to fraction form
    971.29/1,340.39 = 529.20/x
  3. Step 3: Cross multiply
    971.29x = 1,340.39 × 529.20
  4. Step 4: Simplify right side
    971.29x = 709,334.39
  5. Step 5: Solve for x
    x = 709,334.39/971.29
  6. Step 6: Final answer
    x = 730.30

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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.