Home / 2,099.28-2,897.28-1,215.36

Finding the Fourth Proportional to 2,099.28, 2,897.28 and 1,215.36

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Solution

The fourth proportional to 2,099.28, 2,897.28 and 1,215.36 is: 1,677.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,099.28 : 2,897.28 = 1,215.36 : x
  2. Step 2: Convert to fraction form
    2,099.28/2,897.28 = 1,215.36/x
  3. Step 3: Cross multiply
    2,099.28x = 2,897.28 × 1,215.36
  4. Step 4: Simplify right side
    2,099.28x = 3,521,238.22
  5. Step 5: Solve for x
    x = 3,521,238.22/2,099.28
  6. Step 6: Final answer
    x = 1,677.36

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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.