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Finding the Fourth Proportional to 667,203.77, 920,807.13 and 380,766.92

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Solution

The fourth proportional to 667,203.77, 920,807.13 and 380,766.92 is: 525,495.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,203.77 : 920,807.13 = 380,766.92 : x
  2. Step 2: Convert to fraction form
    667,203.77/920,807.13 = 380,766.92/x
  3. Step 3: Cross multiply
    667,203.77x = 920,807.13 × 380,766.92
  4. Step 4: Simplify right side
    667,203.77x = 350,612,890,200.10
  5. Step 5: Solve for x
    x = 350,612,890,200.10/667,203.77
  6. Step 6: Final answer
    x = 525,495.97

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.