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Finding the Fourth Proportional to 1,728.12, 2,590.04 and 849.90

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Solution

The fourth proportional to 1,728.12, 2,590.04 and 849.90 is: 1,273.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,728.12 : 2,590.04 = 849.90 : x
  2. Step 2: Convert to fraction form
    1,728.12/2,590.04 = 849.90/x
  3. Step 3: Cross multiply
    1,728.12x = 2,590.04 × 849.90
  4. Step 4: Simplify right side
    1,728.12x = 2,201,275.00
  5. Step 5: Solve for x
    x = 2,201,275.00/1,728.12
  6. Step 6: Final answer
    x = 1,273.80

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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.