Home / 1,320.52-1,981.05-1,311.34

Finding the Fourth Proportional to 1,320.52, 1,981.05 and 1,311.34

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Solution

The fourth proportional to 1,320.52, 1,981.05 and 1,311.34 is: 1,967.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,320.52 : 1,981.05 = 1,311.34 : x
  2. Step 2: Convert to fraction form
    1,320.52/1,981.05 = 1,311.34/x
  3. Step 3: Cross multiply
    1,320.52x = 1,981.05 × 1,311.34
  4. Step 4: Simplify right side
    1,320.52x = 2,597,830.11
  5. Step 5: Solve for x
    x = 2,597,830.11/1,320.52
  6. Step 6: Final answer
    x = 1,967.28

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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.