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Finding the Fourth Proportional to 2,818.65, 4,226.55 and 870.60

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Solution

The fourth proportional to 2,818.65, 4,226.55 and 870.60 is: 1,305.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,818.65 : 4,226.55 = 870.60 : x
  2. Step 2: Convert to fraction form
    2,818.65/4,226.55 = 870.60/x
  3. Step 3: Cross multiply
    2,818.65x = 4,226.55 × 870.60
  4. Step 4: Simplify right side
    2,818.65x = 3,679,634.43
  5. Step 5: Solve for x
    x = 3,679,634.43/2,818.65
  6. Step 6: Final answer
    x = 1,305.46

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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.