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Finding the Fourth Proportional to 303.19, 454.93 and 140.78

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Solution

The fourth proportional to 303.19, 454.93 and 140.78 is: 211.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    303.19 : 454.93 = 140.78 : x
  2. Step 2: Convert to fraction form
    303.19/454.93 = 140.78/x
  3. Step 3: Cross multiply
    303.19x = 454.93 × 140.78
  4. Step 4: Simplify right side
    303.19x = 64,045.83
  5. Step 5: Solve for x
    x = 64,045.83/303.19
  6. Step 6: Final answer
    x = 211.24

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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.