Home / 4,319.89-6,480.87-1,398.20

Finding the Fourth Proportional to 4,319.89, 6,480.87 and 1,398.20

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Solution

The fourth proportional to 4,319.89, 6,480.87 and 1,398.20 is: 2,097.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,319.89 : 6,480.87 = 1,398.20 : x
  2. Step 2: Convert to fraction form
    4,319.89/6,480.87 = 1,398.20/x
  3. Step 3: Cross multiply
    4,319.89x = 6,480.87 × 1,398.20
  4. Step 4: Simplify right side
    4,319.89x = 9,061,543.11
  5. Step 5: Solve for x
    x = 9,061,543.11/4,319.89
  6. Step 6: Final answer
    x = 2,097.63

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1.5x scale

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.