Home / 2,869.80-4,299.30-1,478.40

Finding the Fourth Proportional to 2,869.80, 4,299.30 and 1,478.40

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Solution

The fourth proportional to 2,869.80, 4,299.30 and 1,478.40 is: 2,214.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,869.80 : 4,299.30 = 1,478.40 : x
  2. Step 2: Convert to fraction form
    2,869.80/4,299.30 = 1,478.40/x
  3. Step 3: Cross multiply
    2,869.80x = 4,299.30 × 1,478.40
  4. Step 4: Simplify right side
    2,869.80x = 6,356,085.12
  5. Step 5: Solve for x
    x = 6,356,085.12/2,869.80
  6. Step 6: Final answer
    x = 2,214.82

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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.