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Finding the Fourth Proportional to 661,843.80, 990,432.90 and 605,856.60

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Solution

The fourth proportional to 661,843.80, 990,432.90 and 605,856.60 is: 906,649.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,843.80 : 990,432.90 = 605,856.60 : x
  2. Step 2: Convert to fraction form
    661,843.80/990,432.90 = 605,856.60/x
  3. Step 3: Cross multiply
    661,843.80x = 990,432.90 × 605,856.60
  4. Step 4: Simplify right side
    661,843.80x = 600,060,309,322.14
  5. Step 5: Solve for x
    x = 600,060,309,322.14/661,843.80
  6. Step 6: Final answer
    x = 906,649.44

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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.