Home / 2,275.10-3,412.65-1,987.10

Finding the Fourth Proportional to 2,275.10, 3,412.65 and 1,987.10

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Solution

The fourth proportional to 2,275.10, 3,412.65 and 1,987.10 is: 2,980.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,275.10 : 3,412.65 = 1,987.10 : x
  2. Step 2: Convert to fraction form
    2,275.10/3,412.65 = 1,987.10/x
  3. Step 3: Cross multiply
    2,275.10x = 3,412.65 × 1,987.10
  4. Step 4: Simplify right side
    2,275.10x = 6,781,276.82
  5. Step 5: Solve for x
    x = 6,781,276.82/2,275.10
  6. Step 6: Final answer
    x = 2,980.65

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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.