Home / 4,319.78-6,479.76-1,398.38

Finding the Fourth Proportional to 4,319.78, 6,479.76 and 1,398.38

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Solution

The fourth proportional to 4,319.78, 6,479.76 and 1,398.38 is: 2,097.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,319.78 : 6,479.76 = 1,398.38 : x
  2. Step 2: Convert to fraction form
    4,319.78/6,479.76 = 1,398.38/x
  3. Step 3: Cross multiply
    4,319.78x = 6,479.76 × 1,398.38
  4. Step 4: Simplify right side
    4,319.78x = 9,061,166.79
  5. Step 5: Solve for x
    x = 9,061,166.79/4,319.78
  6. Step 6: Final answer
    x = 2,097.60

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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.