Home / 3,478.10-4,799.70-2,151.45

Finding the Fourth Proportional to 3,478.10, 4,799.70 and 2,151.45

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Solution

The fourth proportional to 3,478.10, 4,799.70 and 2,151.45 is: 2,968.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,478.10 : 4,799.70 = 2,151.45 : x
  2. Step 2: Convert to fraction form
    3,478.10/4,799.70 = 2,151.45/x
  3. Step 3: Cross multiply
    3,478.10x = 4,799.70 × 2,151.45
  4. Step 4: Simplify right side
    3,478.10x = 10,326,314.57
  5. Step 5: Solve for x
    x = 10,326,314.57/3,478.10
  6. Step 6: Final answer
    x = 2,968.96

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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.