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Finding the Fourth Proportional to 950.70, 1,426.40 and 430.54

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Solution

The fourth proportional to 950.70, 1,426.40 and 430.54 is: 645.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    950.70 : 1,426.40 = 430.54 : x
  2. Step 2: Convert to fraction form
    950.70/1,426.40 = 430.54/x
  3. Step 3: Cross multiply
    950.70x = 1,426.40 × 430.54
  4. Step 4: Simplify right side
    950.70x = 614,122.26
  5. Step 5: Solve for x
    x = 614,122.26/950.70
  6. Step 6: Final answer
    x = 645.97

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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.