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Finding the Fourth Proportional to 2,742.80, 4,113.28 and 893.48

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Solution

The fourth proportional to 2,742.80, 4,113.28 and 893.48 is: 1,339.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,742.80 : 4,113.28 = 893.48 : x
  2. Step 2: Convert to fraction form
    2,742.80/4,113.28 = 893.48/x
  3. Step 3: Cross multiply
    2,742.80x = 4,113.28 × 893.48
  4. Step 4: Simplify right side
    2,742.80x = 3,675,133.41
  5. Step 5: Solve for x
    x = 3,675,133.41/2,742.80
  6. Step 6: Final answer
    x = 1,339.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.