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Finding the Fourth Proportional to 407,515.61, 611,244.55 and 107,989.56

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Solution

The fourth proportional to 407,515.61, 611,244.55 and 107,989.56 is: 161,976.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,515.61 : 611,244.55 = 107,989.56 : x
  2. Step 2: Convert to fraction form
    407,515.61/611,244.55 = 107,989.56/x
  3. Step 3: Cross multiply
    407,515.61x = 611,244.55 × 107,989.56
  4. Step 4: Simplify right side
    407,515.61x = 66,008,030,006.90
  5. Step 5: Solve for x
    x = 66,008,030,006.90/407,515.61
  6. Step 6: Final answer
    x = 161,976.69

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1.5x scale

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.