Home / 2,987.32-4,122.59-1,728.26

Finding the Fourth Proportional to 2,987.32, 4,122.59 and 1,728.26

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Solution

The fourth proportional to 2,987.32, 4,122.59 and 1,728.26 is: 2,385.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,987.32 : 4,122.59 = 1,728.26 : x
  2. Step 2: Convert to fraction form
    2,987.32/4,122.59 = 1,728.26/x
  3. Step 3: Cross multiply
    2,987.32x = 4,122.59 × 1,728.26
  4. Step 4: Simplify right side
    2,987.32x = 7,124,907.39
  5. Step 5: Solve for x
    x = 7,124,907.39/2,987.32
  6. Step 6: Final answer
    x = 2,385.05

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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.