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Finding the Fourth Proportional to 877.44, 1,314.24 and 620.16

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Solution

The fourth proportional to 877.44, 1,314.24 and 620.16 is: 928.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    877.44 : 1,314.24 = 620.16 : x
  2. Step 2: Convert to fraction form
    877.44/1,314.24 = 620.16/x
  3. Step 3: Cross multiply
    877.44x = 1,314.24 × 620.16
  4. Step 4: Simplify right side
    877.44x = 815,039.08
  5. Step 5: Solve for x
    x = 815,039.08/877.44
  6. Step 6: Final answer
    x = 928.88

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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.