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Finding the Fourth Proportional to 968.48, 1,452.58 and 391.40

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Solution

The fourth proportional to 968.48, 1,452.58 and 391.40 is: 587.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    968.48 : 1,452.58 = 391.40 : x
  2. Step 2: Convert to fraction form
    968.48/1,452.58 = 391.40/x
  3. Step 3: Cross multiply
    968.48x = 1,452.58 × 391.40
  4. Step 4: Simplify right side
    968.48x = 568,539.81
  5. Step 5: Solve for x
    x = 568,539.81/968.48
  6. Step 6: Final answer
    x = 587.04

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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.