Home / 1,638.24-2,258.56-1,587.28

Finding the Fourth Proportional to 1,638.24, 2,258.56 and 1,587.28

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Solution

The fourth proportional to 1,638.24, 2,258.56 and 1,587.28 is: 2,188.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,638.24 : 2,258.56 = 1,587.28 : x
  2. Step 2: Convert to fraction form
    1,638.24/2,258.56 = 1,587.28/x
  3. Step 3: Cross multiply
    1,638.24x = 2,258.56 × 1,587.28
  4. Step 4: Simplify right side
    1,638.24x = 3,584,967.12
  5. Step 5: Solve for x
    x = 3,584,967.12/1,638.24
  6. Step 6: Final answer
    x = 2,188.30

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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.