Home / 2,176.30-3,001.26-1,388.98

Finding the Fourth Proportional to 2,176.30, 3,001.26 and 1,388.98

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Solution

The fourth proportional to 2,176.30, 3,001.26 and 1,388.98 is: 1,915.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,176.30 : 3,001.26 = 1,388.98 : x
  2. Step 2: Convert to fraction form
    2,176.30/3,001.26 = 1,388.98/x
  3. Step 3: Cross multiply
    2,176.30x = 3,001.26 × 1,388.98
  4. Step 4: Simplify right side
    2,176.30x = 4,168,690.11
  5. Step 5: Solve for x
    x = 4,168,690.11/2,176.30
  6. Step 6: Final answer
    x = 1,915.49

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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.