Home / 2,165.36-2,987.76-1,281.28

Finding the Fourth Proportional to 2,165.36, 2,987.76 and 1,281.28

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Solution

The fourth proportional to 2,165.36, 2,987.76 and 1,281.28 is: 1,767.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,165.36 : 2,987.76 = 1,281.28 : x
  2. Step 2: Convert to fraction form
    2,165.36/2,987.76 = 1,281.28/x
  3. Step 3: Cross multiply
    2,165.36x = 2,987.76 × 1,281.28
  4. Step 4: Simplify right side
    2,165.36x = 3,828,157.13
  5. Step 5: Solve for x
    x = 3,828,157.13/2,165.36
  6. Step 6: Final answer
    x = 1,767.91

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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.