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Finding the Fourth Proportional to 601.48, 829.88 and 391.68

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Solution

The fourth proportional to 601.48, 829.88 and 391.68 is: 540.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    601.48 : 829.88 = 391.68 : x
  2. Step 2: Convert to fraction form
    601.48/829.88 = 391.68/x
  3. Step 3: Cross multiply
    601.48x = 829.88 × 391.68
  4. Step 4: Simplify right side
    601.48x = 325,047.40
  5. Step 5: Solve for x
    x = 325,047.40/601.48
  6. Step 6: Final answer
    x = 540.41

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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.