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Finding the Fourth Proportional to 958.40, 1,436.20 and 470.88

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Solution

The fourth proportional to 958.40, 1,436.20 and 470.88 is: 705.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    958.40 : 1,436.20 = 470.88 : x
  2. Step 2: Convert to fraction form
    958.40/1,436.20 = 470.88/x
  3. Step 3: Cross multiply
    958.40x = 1,436.20 × 470.88
  4. Step 4: Simplify right side
    958.40x = 676,277.86
  5. Step 5: Solve for x
    x = 676,277.86/958.40
  6. Step 6: Final answer
    x = 705.63

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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.