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Finding the Fourth Proportional to 958.74, 1,437.65 and 438.59

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Solution

The fourth proportional to 958.74, 1,437.65 and 438.59 is: 657.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    958.74 : 1,437.65 = 438.59 : x
  2. Step 2: Convert to fraction form
    958.74/1,437.65 = 438.59/x
  3. Step 3: Cross multiply
    958.74x = 1,437.65 × 438.59
  4. Step 4: Simplify right side
    958.74x = 630,529.53
  5. Step 5: Solve for x
    x = 630,529.53/958.74
  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.