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Finding the Fourth Proportional to 950.80, 1,423.80 and 624.40

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Solution

The fourth proportional to 950.80, 1,423.80 and 624.40 is: 935.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    950.80 : 1,423.80 = 624.40 : x
  2. Step 2: Convert to fraction form
    950.80/1,423.80 = 624.40/x
  3. Step 3: Cross multiply
    950.80x = 1,423.80 × 624.40
  4. Step 4: Simplify right side
    950.80x = 889,020.72
  5. Step 5: Solve for x
    x = 889,020.72/950.80
  6. Step 6: Final answer
    x = 935.02

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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.