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Finding the Fourth Proportional to 1,479.32, 2,215.78 and 902.68

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Solution

The fourth proportional to 1,479.32, 2,215.78 and 902.68 is: 1,352.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,479.32 : 2,215.78 = 902.68 : x
  2. Step 2: Convert to fraction form
    1,479.32/2,215.78 = 902.68/x
  3. Step 3: Cross multiply
    1,479.32x = 2,215.78 × 902.68
  4. Step 4: Simplify right side
    1,479.32x = 2,000,140.29
  5. Step 5: Solve for x
    x = 2,000,140.29/1,479.32
  6. Step 6: Final answer
    x = 1,352.07

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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.