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Finding the Fourth Proportional to 885.12, 1,212.60 and 852.24

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Solution

The fourth proportional to 885.12, 1,212.60 and 852.24 is: 1,167.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    885.12 : 1,212.60 = 852.24 : x
  2. Step 2: Convert to fraction form
    885.12/1,212.60 = 852.24/x
  3. Step 3: Cross multiply
    885.12x = 1,212.60 × 852.24
  4. Step 4: Simplify right side
    885.12x = 1,033,426.22
  5. Step 5: Solve for x
    x = 1,033,426.22/885.12
  6. Step 6: Final answer
    x = 1,167.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.