Home / 2,931.78-4,043.49-1,869.22

Finding the Fourth Proportional to 2,931.78, 4,043.49 and 1,869.22

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Solution

The fourth proportional to 2,931.78, 4,043.49 and 1,869.22 is: 2,578.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,931.78 : 4,043.49 = 1,869.22 : x
  2. Step 2: Convert to fraction form
    2,931.78/4,043.49 = 1,869.22/x
  3. Step 3: Cross multiply
    2,931.78x = 4,043.49 × 1,869.22
  4. Step 4: Simplify right side
    2,931.78x = 7,558,152.16
  5. Step 5: Solve for x
    x = 7,558,152.16/2,931.78
  6. Step 6: Final answer
    x = 2,578.01

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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.