Home / 1,325.20-1,828.80-801.12

Finding the Fourth Proportional to 1,325.20, 1,828.80 and 801.12

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Solution

The fourth proportional to 1,325.20, 1,828.80 and 801.12 is: 1,105.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,325.20 : 1,828.80 = 801.12 : x
  2. Step 2: Convert to fraction form
    1,325.20/1,828.80 = 801.12/x
  3. Step 3: Cross multiply
    1,325.20x = 1,828.80 × 801.12
  4. Step 4: Simplify right side
    1,325.20x = 1,465,088.26
  5. Step 5: Solve for x
    x = 1,465,088.26/1,325.20
  6. Step 6: Final answer
    x = 1,105.56

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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.