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Finding the Fourth Proportional to 971.48, 1,340.21 and 598.28

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Solution

The fourth proportional to 971.48, 1,340.21 and 598.28 is: 825.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    971.48 : 1,340.21 = 598.28 : x
  2. Step 2: Convert to fraction form
    971.48/1,340.21 = 598.28/x
  3. Step 3: Cross multiply
    971.48x = 1,340.21 × 598.28
  4. Step 4: Simplify right side
    971.48x = 801,815.63
  5. Step 5: Solve for x
    x = 801,815.63/971.48
  6. Step 6: Final answer
    x = 825.35

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1.5x scale

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.