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Finding the Fourth Proportional to 971.74, 1,455.33 and 711.08

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Solution

The fourth proportional to 971.74, 1,455.33 and 711.08 is: 1,064.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    971.74 : 1,455.33 = 711.08 : x
  2. Step 2: Convert to fraction form
    971.74/1,455.33 = 711.08/x
  3. Step 3: Cross multiply
    971.74x = 1,455.33 × 711.08
  4. Step 4: Simplify right side
    971.74x = 1,034,856.06
  5. Step 5: Solve for x
    x = 1,034,856.06/971.74
  6. Step 6: Final answer
    x = 1,064.95

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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.