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Finding the Fourth Proportional to 2,257.16, 3,386.40 and 870.62

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Solution

The fourth proportional to 2,257.16, 3,386.40 and 870.62 is: 1,306.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,257.16 : 3,386.40 = 870.62 : x
  2. Step 2: Convert to fraction form
    2,257.16/3,386.40 = 870.62/x
  3. Step 3: Cross multiply
    2,257.16x = 3,386.40 × 870.62
  4. Step 4: Simplify right side
    2,257.16x = 2,948,267.57
  5. Step 5: Solve for x
    x = 2,948,267.57/2,257.16
  6. Step 6: Final answer
    x = 1,306.18

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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.