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Finding the Fourth Proportional to 3,078.90, 4,248.90 and 1,752.39

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Solution

The fourth proportional to 3,078.90, 4,248.90 and 1,752.39 is: 2,418.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,078.90 : 4,248.90 = 1,752.39 : x
  2. Step 2: Convert to fraction form
    3,078.90/4,248.90 = 1,752.39/x
  3. Step 3: Cross multiply
    3,078.90x = 4,248.90 × 1,752.39
  4. Step 4: Simplify right side
    3,078.90x = 7,445,729.87
  5. Step 5: Solve for x
    x = 7,445,729.87/3,078.90
  6. Step 6: Final answer
    x = 2,418.31

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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.