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Finding the Fourth Proportional to 971.39, 1,339.74 and 598.25

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Solution

The fourth proportional to 971.39, 1,339.74 and 598.25 is: 825.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    971.39 : 1,339.74 = 598.25 : x
  2. Step 2: Convert to fraction form
    971.39/1,339.74 = 598.25/x
  3. Step 3: Cross multiply
    971.39x = 1,339.74 × 598.25
  4. Step 4: Simplify right side
    971.39x = 801,502.80
  5. Step 5: Solve for x
    x = 801,502.80/971.39
  6. Step 6: Final answer
    x = 825.11

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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.