Home / 2,472.20-3,702.30-1,315.40

Finding the Fourth Proportional to 2,472.20, 3,702.30 and 1,315.40

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Solution

The fourth proportional to 2,472.20, 3,702.30 and 1,315.40 is: 1,969.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,472.20 : 3,702.30 = 1,315.40 : x
  2. Step 2: Convert to fraction form
    2,472.20/3,702.30 = 1,315.40/x
  3. Step 3: Cross multiply
    2,472.20x = 3,702.30 × 1,315.40
  4. Step 4: Simplify right side
    2,472.20x = 4,870,005.42
  5. Step 5: Solve for x
    x = 4,870,005.42/2,472.20
  6. Step 6: Final answer
    x = 1,969.91

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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.