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Finding the Fourth Proportional to 274,415.40, 411,653.34 and 87,383.88

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Solution

The fourth proportional to 274,415.40, 411,653.34 and 87,383.88 is: 131,085.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    274,415.40 : 411,653.34 = 87,383.88 : x
  2. Step 2: Convert to fraction form
    274,415.40/411,653.34 = 87,383.88/x
  3. Step 3: Cross multiply
    274,415.40x = 411,653.34 × 87,383.88
  4. Step 4: Simplify right side
    274,415.40x = 35,971,866,064.16
  5. Step 5: Solve for x
    x = 35,971,866,064.16/274,415.40
  6. Step 6: Final answer
    x = 131,085.45

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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.