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Finding the Fourth Proportional to 667,317.30, 998,643.15 and 611,330.10

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Solution

The fourth proportional to 667,317.30, 998,643.15 and 611,330.10 is: 914,858.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,317.30 : 998,643.15 = 611,330.10 : x
  2. Step 2: Convert to fraction form
    667,317.30/998,643.15 = 611,330.10/x
  3. Step 3: Cross multiply
    667,317.30x = 998,643.15 × 611,330.10
  4. Step 4: Simplify right side
    667,317.30x = 610,500,616,753.82
  5. Step 5: Solve for x
    x = 610,500,616,753.82/667,317.30
  6. Step 6: Final answer
    x = 914,858.07

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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.