Home / 1,432.40-2,152.20-912.65

Finding the Fourth Proportional to 1,432.40, 2,152.20 and 912.65

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Solution

The fourth proportional to 1,432.40, 2,152.20 and 912.65 is: 1,371.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,432.40 : 2,152.20 = 912.65 : x
  2. Step 2: Convert to fraction form
    1,432.40/2,152.20 = 912.65/x
  3. Step 3: Cross multiply
    1,432.40x = 2,152.20 × 912.65
  4. Step 4: Simplify right side
    1,432.40x = 1,964,205.33
  5. Step 5: Solve for x
    x = 1,964,205.33/1,432.40
  6. Step 6: Final answer
    x = 1,371.27

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1.5x scale

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.