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Finding the Fourth Proportional to 391.04, 540.06 and 266.48

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Solution

The fourth proportional to 391.04, 540.06 and 266.48 is: 368.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    391.04 : 540.06 = 266.48 : x
  2. Step 2: Convert to fraction form
    391.04/540.06 = 266.48/x
  3. Step 3: Cross multiply
    391.04x = 540.06 × 266.48
  4. Step 4: Simplify right side
    391.04x = 143,915.19
  5. Step 5: Solve for x
    x = 143,915.19/391.04
  6. Step 6: Final answer
    x = 368.03

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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.