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Finding the Fourth Proportional to 427,994.41, 641,990.07 and 128,473.69

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Solution

The fourth proportional to 427,994.41, 641,990.07 and 128,473.69 is: 192,710.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,994.41 : 641,990.07 = 128,473.69 : x
  2. Step 2: Convert to fraction form
    427,994.41/641,990.07 = 128,473.69/x
  3. Step 3: Cross multiply
    427,994.41x = 641,990.07 × 128,473.69
  4. Step 4: Simplify right side
    427,994.41x = 82,478,833,236.26
  5. Step 5: Solve for x
    x = 82,478,833,236.26/427,994.41
  6. Step 6: Final answer
    x = 192,710.07

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Similar ratio
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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.