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Finding the Fourth Proportional to 660.56, 910.60 and 591.44

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Solution

The fourth proportional to 660.56, 910.60 and 591.44 is: 815.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    660.56 : 910.60 = 591.44 : x
  2. Step 2: Convert to fraction form
    660.56/910.60 = 591.44/x
  3. Step 3: Cross multiply
    660.56x = 910.60 × 591.44
  4. Step 4: Simplify right side
    660.56x = 538,565.26
  5. Step 5: Solve for x
    x = 538,565.26/660.56
  6. Step 6: Final answer
    x = 815.32

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.