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Finding the Fourth Proportional to 385,850.77, 578,860.73 and 129,674.16

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Solution

The fourth proportional to 385,850.77, 578,860.73 and 129,674.16 is: 194,539.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,850.77 : 578,860.73 = 129,674.16 : x
  2. Step 2: Convert to fraction form
    385,850.77/578,860.73 = 129,674.16/x
  3. Step 3: Cross multiply
    385,850.77x = 578,860.73 × 129,674.16
  4. Step 4: Simplify right side
    385,850.77x = 75,063,278,919.74
  5. Step 5: Solve for x
    x = 75,063,278,919.74/385,850.77
  6. Step 6: Final answer
    x = 194,539.66

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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.