Home / 2,887.67-4,331.64-939.80

Finding the Fourth Proportional to 2,887.67, 4,331.64 and 939.80

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Solution

The fourth proportional to 2,887.67, 4,331.64 and 939.80 is: 1,409.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,887.67 : 4,331.64 = 939.80 : x
  2. Step 2: Convert to fraction form
    2,887.67/4,331.64 = 939.80/x
  3. Step 3: Cross multiply
    2,887.67x = 4,331.64 × 939.80
  4. Step 4: Simplify right side
    2,887.67x = 4,070,875.27
  5. Step 5: Solve for x
    x = 4,070,875.27/2,887.67
  6. Step 6: Final answer
    x = 1,409.74

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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.