Home / 1,938.30-2,905.08-841.38

Finding the Fourth Proportional to 1,938.30, 2,905.08 and 841.38

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Solution

The fourth proportional to 1,938.30, 2,905.08 and 841.38 is: 1,261.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,938.30 : 2,905.08 = 841.38 : x
  2. Step 2: Convert to fraction form
    1,938.30/2,905.08 = 841.38/x
  3. Step 3: Cross multiply
    1,938.30x = 2,905.08 × 841.38
  4. Step 4: Simplify right side
    1,938.30x = 2,444,276.21
  5. Step 5: Solve for x
    x = 2,444,276.21/1,938.30
  6. Step 6: Final answer
    x = 1,261.04

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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.