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Finding the Fourth Proportional to 2,807.14, 4,210.68 and 755.14

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Solution

The fourth proportional to 2,807.14, 4,210.68 and 755.14 is: 1,132.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,807.14 : 4,210.68 = 755.14 : x
  2. Step 2: Convert to fraction form
    2,807.14/4,210.68 = 755.14/x
  3. Step 3: Cross multiply
    2,807.14x = 4,210.68 × 755.14
  4. Step 4: Simplify right side
    2,807.14x = 3,179,652.90
  5. Step 5: Solve for x
    x = 3,179,652.90/2,807.14
  6. Step 6: Final answer
    x = 1,132.70

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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.