Home / 1,152.20-1,589.49-709.94

Finding the Fourth Proportional to 1,152.20, 1,589.49 and 709.94

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Solution

The fourth proportional to 1,152.20, 1,589.49 and 709.94 is: 979.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,152.20 : 1,589.49 = 709.94 : x
  2. Step 2: Convert to fraction form
    1,152.20/1,589.49 = 709.94/x
  3. Step 3: Cross multiply
    1,152.20x = 1,589.49 × 709.94
  4. Step 4: Simplify right side
    1,152.20x = 1,128,431.03
  5. Step 5: Solve for x
    x = 1,128,431.03/1,152.20
  6. Step 6: Final answer
    x = 979.38

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1.5x scale

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.