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Finding the Fourth Proportional to 885.28, 1,326.48 and 559.60

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Solution

The fourth proportional to 885.28, 1,326.48 and 559.60 is: 838.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    885.28 : 1,326.48 = 559.60 : x
  2. Step 2: Convert to fraction form
    885.28/1,326.48 = 559.60/x
  3. Step 3: Cross multiply
    885.28x = 1,326.48 × 559.60
  4. Step 4: Simplify right side
    885.28x = 742,298.21
  5. Step 5: Solve for x
    x = 742,298.21/885.28
  6. Step 6: Final answer
    x = 838.49

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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.