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Finding the Fourth Proportional to 291,996.89, 438,073.19 and 92,321.02

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Solution

The fourth proportional to 291,996.89, 438,073.19 and 92,321.02 is: 138,506.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,996.89 : 438,073.19 = 92,321.02 : x
  2. Step 2: Convert to fraction form
    291,996.89/438,073.19 = 92,321.02/x
  3. Step 3: Cross multiply
    291,996.89x = 438,073.19 × 92,321.02
  4. Step 4: Simplify right side
    291,996.89x = 40,443,363,735.45
  5. Step 5: Solve for x
    x = 40,443,363,735.45/291,996.89
  6. Step 6: Final answer
    x = 138,506.15

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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.