Home / 1,023.20-1,412.32-970.96

Finding the Fourth Proportional to 1,023.20, 1,412.32 and 970.96

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Solution

The fourth proportional to 1,023.20, 1,412.32 and 970.96 is: 1,340.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,023.20 : 1,412.32 = 970.96 : x
  2. Step 2: Convert to fraction form
    1,023.20/1,412.32 = 970.96/x
  3. Step 3: Cross multiply
    1,023.20x = 1,412.32 × 970.96
  4. Step 4: Simplify right side
    1,023.20x = 1,371,306.23
  5. Step 5: Solve for x
    x = 1,371,306.23/1,023.20
  6. Step 6: Final answer
    x = 1,340.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.