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Finding the Fourth Proportional to 2,713.80, 4,070.73 and 864.90

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Solution

The fourth proportional to 2,713.80, 4,070.73 and 864.90 is: 1,297.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,713.80 : 4,070.73 = 864.90 : x
  2. Step 2: Convert to fraction form
    2,713.80/4,070.73 = 864.90/x
  3. Step 3: Cross multiply
    2,713.80x = 4,070.73 × 864.90
  4. Step 4: Simplify right side
    2,713.80x = 3,520,774.38
  5. Step 5: Solve for x
    x = 3,520,774.38/2,713.80
  6. Step 6: Final answer
    x = 1,297.36

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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.