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Finding the Fourth Proportional to 1,156.55, 1,734.45 and 971.51

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Solution

The fourth proportional to 1,156.55, 1,734.45 and 971.51 is: 1,456.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,156.55 : 1,734.45 = 971.51 : x
  2. Step 2: Convert to fraction form
    1,156.55/1,734.45 = 971.51/x
  3. Step 3: Cross multiply
    1,156.55x = 1,734.45 × 971.51
  4. Step 4: Simplify right side
    1,156.55x = 1,685,029.74
  5. Step 5: Solve for x
    x = 1,685,029.74/1,156.55
  6. Step 6: Final answer
    x = 1,456.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.