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Finding the Fourth Proportional to 971.05, 1,340.05 and 528.96

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Solution

The fourth proportional to 971.05, 1,340.05 and 528.96 is: 729.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    971.05 : 1,340.05 = 528.96 : x
  2. Step 2: Convert to fraction form
    971.05/1,340.05 = 528.96/x
  3. Step 3: Cross multiply
    971.05x = 1,340.05 × 528.96
  4. Step 4: Simplify right side
    971.05x = 708,834.17
  5. Step 5: Solve for x
    x = 708,834.17/971.05
  6. Step 6: Final answer
    x = 729.97

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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.