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Finding the Fourth Proportional to 958.50, 1,437.62 and 438.48

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Solution

The fourth proportional to 958.50, 1,437.62 and 438.48 is: 657.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    958.50 : 1,437.62 = 438.48 : x
  2. Step 2: Convert to fraction form
    958.50/1,437.62 = 438.48/x
  3. Step 3: Cross multiply
    958.50x = 1,437.62 × 438.48
  4. Step 4: Simplify right side
    958.50x = 630,365.43
  5. Step 5: Solve for x
    x = 630,365.43/958.50
  6. Step 6: Final answer
    x = 657.66

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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.