Home / 1,324.32-1,827.56-820.40

Finding the Fourth Proportional to 1,324.32, 1,827.56 and 820.40

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Solution

The fourth proportional to 1,324.32, 1,827.56 and 820.40 is: 1,132.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,324.32 : 1,827.56 = 820.40 : x
  2. Step 2: Convert to fraction form
    1,324.32/1,827.56 = 820.40/x
  3. Step 3: Cross multiply
    1,324.32x = 1,827.56 × 820.40
  4. Step 4: Simplify right side
    1,324.32x = 1,499,330.22
  5. Step 5: Solve for x
    x = 1,499,330.22/1,324.32
  6. Step 6: Final answer
    x = 1,132.15

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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.