Home / 3,129.90-4,319.31-1,732.65

Finding the Fourth Proportional to 3,129.90, 4,319.31 and 1,732.65

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Solution

The fourth proportional to 3,129.90, 4,319.31 and 1,732.65 is: 2,391.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,129.90 : 4,319.31 = 1,732.65 : x
  2. Step 2: Convert to fraction form
    3,129.90/4,319.31 = 1,732.65/x
  3. Step 3: Cross multiply
    3,129.90x = 4,319.31 × 1,732.65
  4. Step 4: Simplify right side
    3,129.90x = 7,483,852.47
  5. Step 5: Solve for x
    x = 7,483,852.47/3,129.90
  6. Step 6: Final answer
    x = 2,391.08

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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.