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Finding the Fourth Proportional to 345.99, 477.28 and 240.90

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Solution

The fourth proportional to 345.99, 477.28 and 240.90 is: 332.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    345.99 : 477.28 = 240.90 : x
  2. Step 2: Convert to fraction form
    345.99/477.28 = 240.90/x
  3. Step 3: Cross multiply
    345.99x = 477.28 × 240.90
  4. Step 4: Simplify right side
    345.99x = 114,976.75
  5. Step 5: Solve for x
    x = 114,976.75/345.99
  6. Step 6: Final answer
    x = 332.31

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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.