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Finding the Fourth Proportional to 667,313.80, 998,637.90 and 611,326.60

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Solution

The fourth proportional to 667,313.80, 998,637.90 and 611,326.60 is: 914,852.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,313.80 : 998,637.90 = 611,326.60 : x
  2. Step 2: Convert to fraction form
    667,313.80/998,637.90 = 611,326.60/x
  3. Step 3: Cross multiply
    667,313.80x = 998,637.90 × 611,326.60
  4. Step 4: Simplify right side
    667,313.80x = 610,493,912,038.14
  5. Step 5: Solve for x
    x = 610,493,912,038.14/667,313.80
  6. Step 6: Final answer
    x = 914,852.82

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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.