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Finding the Fourth Proportional to 2,755.12, 4,132.68 and 807.32

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Solution

The fourth proportional to 2,755.12, 4,132.68 and 807.32 is: 1,210.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,755.12 : 4,132.68 = 807.32 : x
  2. Step 2: Convert to fraction form
    2,755.12/4,132.68 = 807.32/x
  3. Step 3: Cross multiply
    2,755.12x = 4,132.68 × 807.32
  4. Step 4: Simplify right side
    2,755.12x = 3,336,395.22
  5. Step 5: Solve for x
    x = 3,336,395.22/2,755.12
  6. Step 6: Final answer
    x = 1,210.98

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1.5x scale

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.