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Finding the Fourth Proportional to 274,431.40, 411,647.10 and 97,138.60

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Solution

The fourth proportional to 274,431.40, 411,647.10 and 97,138.60 is: 145,707.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    274,431.40 : 411,647.10 = 97,138.60 : x
  2. Step 2: Convert to fraction form
    274,431.40/411,647.10 = 97,138.60/x
  3. Step 3: Cross multiply
    274,431.40x = 411,647.10 × 97,138.60
  4. Step 4: Simplify right side
    274,431.40x = 39,986,822,988.06
  5. Step 5: Solve for x
    x = 39,986,822,988.06/274,431.40
  6. Step 6: Final answer
    x = 145,707.90

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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.