Home / 2,887.47-4,331.51-939.21

Finding the Fourth Proportional to 2,887.47, 4,331.51 and 939.21

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Solution

The fourth proportional to 2,887.47, 4,331.51 and 939.21 is: 1,408.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,887.47 : 4,331.51 = 939.21 : x
  2. Step 2: Convert to fraction form
    2,887.47/4,331.51 = 939.21/x
  3. Step 3: Cross multiply
    2,887.47x = 4,331.51 × 939.21
  4. Step 4: Simplify right side
    2,887.47x = 4,068,192.81
  5. Step 5: Solve for x
    x = 4,068,192.81/2,887.47
  6. Step 6: Final answer
    x = 1,408.91

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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.