Home / 3,307.20-4,562.40-1,978.72

Finding the Fourth Proportional to 3,307.20, 4,562.40 and 1,978.72

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Solution

The fourth proportional to 3,307.20, 4,562.40 and 1,978.72 is: 2,729.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,307.20 : 4,562.40 = 1,978.72 : x
  2. Step 2: Convert to fraction form
    3,307.20/4,562.40 = 1,978.72/x
  3. Step 3: Cross multiply
    3,307.20x = 4,562.40 × 1,978.72
  4. Step 4: Simplify right side
    3,307.20x = 9,027,712.13
  5. Step 5: Solve for x
    x = 9,027,712.13/3,307.20
  6. Step 6: Final answer
    x = 2,729.71

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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.