Home / 1,456.96-2,009.28-1,247.20

Finding the Fourth Proportional to 1,456.96, 2,009.28 and 1,247.20

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Solution

The fourth proportional to 1,456.96, 2,009.28 and 1,247.20 is: 1,720.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,456.96 : 2,009.28 = 1,247.20 : x
  2. Step 2: Convert to fraction form
    1,456.96/2,009.28 = 1,247.20/x
  3. Step 3: Cross multiply
    1,456.96x = 2,009.28 × 1,247.20
  4. Step 4: Simplify right side
    1,456.96x = 2,505,974.02
  5. Step 5: Solve for x
    x = 2,505,974.02/1,456.96
  6. Step 6: Final answer
    x = 1,720.00

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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.