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Finding the Fourth Proportional to 495.50, 741.33 and 391.71

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Solution

The fourth proportional to 495.50, 741.33 and 391.71 is: 586.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    495.50 : 741.33 = 391.71 : x
  2. Step 2: Convert to fraction form
    495.50/741.33 = 391.71/x
  3. Step 3: Cross multiply
    495.50x = 741.33 × 391.71
  4. Step 4: Simplify right side
    495.50x = 290,386.37
  5. Step 5: Solve for x
    x = 290,386.37/495.50
  6. Step 6: Final answer
    x = 586.05

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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.