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Finding the Fourth Proportional to 852.20, 1,176.12 and 786.32

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Solution

The fourth proportional to 852.20, 1,176.12 and 786.32 is: 1,085.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    852.20 : 1,176.12 = 786.32 : x
  2. Step 2: Convert to fraction form
    852.20/1,176.12 = 786.32/x
  3. Step 3: Cross multiply
    852.20x = 1,176.12 × 786.32
  4. Step 4: Simplify right side
    852.20x = 924,806.68
  5. Step 5: Solve for x
    x = 924,806.68/852.20
  6. Step 6: Final answer
    x = 1,085.20

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1.5x scale

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.