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Finding the Fourth Proportional to 380,476.86, 570,753.05 and 140,653.60

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Solution

The fourth proportional to 380,476.86, 570,753.05 and 140,653.60 is: 210,994.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,476.86 : 570,753.05 = 140,653.60 : x
  2. Step 2: Convert to fraction form
    380,476.86/570,753.05 = 140,653.60/x
  3. Step 3: Cross multiply
    380,476.86x = 570,753.05 × 140,653.60
  4. Step 4: Simplify right side
    380,476.86x = 80,278,471,193.48
  5. Step 5: Solve for x
    x = 80,278,471,193.48/380,476.86
  6. Step 6: Final answer
    x = 210,994.36

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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.