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Finding the Fourth Proportional to 1,804.10, 2,706.15 and 938.30

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Solution

The fourth proportional to 1,804.10, 2,706.15 and 938.30 is: 1,407.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,804.10 : 2,706.15 = 938.30 : x
  2. Step 2: Convert to fraction form
    1,804.10/2,706.15 = 938.30/x
  3. Step 3: Cross multiply
    1,804.10x = 2,706.15 × 938.30
  4. Step 4: Simplify right side
    1,804.10x = 2,539,180.55
  5. Step 5: Solve for x
    x = 2,539,180.55/1,804.10
  6. Step 6: Final answer
    x = 1,407.45

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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.