Home / 1,655.20-2,480.56-788.32

Finding the Fourth Proportional to 1,655.20, 2,480.56 and 788.32

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Solution

The fourth proportional to 1,655.20, 2,480.56 and 788.32 is: 1,181.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,655.20 : 2,480.56 = 788.32 : x
  2. Step 2: Convert to fraction form
    1,655.20/2,480.56 = 788.32/x
  3. Step 3: Cross multiply
    1,655.20x = 2,480.56 × 788.32
  4. Step 4: Simplify right side
    1,655.20x = 1,955,475.06
  5. Step 5: Solve for x
    x = 1,955,475.06/1,655.20
  6. Step 6: Final answer
    x = 1,181.41

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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.