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Finding the Fourth Proportional to 2,707.65, 4,062.08 and 858.89

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Solution

The fourth proportional to 2,707.65, 4,062.08 and 858.89 is: 1,288.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,707.65 : 4,062.08 = 858.89 : x
  2. Step 2: Convert to fraction form
    2,707.65/4,062.08 = 858.89/x
  3. Step 3: Cross multiply
    2,707.65x = 4,062.08 × 858.89
  4. Step 4: Simplify right side
    2,707.65x = 3,488,855.29
  5. Step 5: Solve for x
    x = 3,488,855.29/2,707.65
  6. Step 6: Final answer
    x = 1,288.52

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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.