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Finding the Fourth Proportional to 885.57, 1,328.30 and 495.32

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Solution

The fourth proportional to 885.57, 1,328.30 and 495.32 is: 742.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    885.57 : 1,328.30 = 495.32 : x
  2. Step 2: Convert to fraction form
    885.57/1,328.30 = 495.32/x
  3. Step 3: Cross multiply
    885.57x = 1,328.30 × 495.32
  4. Step 4: Simplify right side
    885.57x = 657,924.44
  5. Step 5: Solve for x
    x = 657,924.44/885.57
  6. Step 6: Final answer
    x = 742.94

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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.