Home / 2,886.57-4,330.89-938.78

Finding the Fourth Proportional to 2,886.57, 4,330.89 and 938.78

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Solution

The fourth proportional to 2,886.57, 4,330.89 and 938.78 is: 1,408.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,886.57 : 4,330.89 = 938.78 : x
  2. Step 2: Convert to fraction form
    2,886.57/4,330.89 = 938.78/x
  3. Step 3: Cross multiply
    2,886.57x = 4,330.89 × 938.78
  4. Step 4: Simplify right side
    2,886.57x = 4,065,731.26
  5. Step 5: Solve for x
    x = 4,065,731.26/2,886.57
  6. Step 6: Final answer
    x = 1,408.50

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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.