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Finding the Fourth Proportional to 274,428.40, 411,642.60 and 97,135.60

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Solution

The fourth proportional to 274,428.40, 411,642.60 and 97,135.60 is: 145,703.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    274,428.40 : 411,642.60 = 97,135.60 : x
  2. Step 2: Convert to fraction form
    274,428.40/411,642.60 = 97,135.60/x
  3. Step 3: Cross multiply
    274,428.40x = 411,642.60 × 97,135.60
  4. Step 4: Simplify right side
    274,428.40x = 39,985,150,936.56
  5. Step 5: Solve for x
    x = 39,985,150,936.56/274,428.40
  6. Step 6: Final answer
    x = 145,703.40

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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.