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Finding the Fourth Proportional to 385,392.60, 578,144.02 and 119,173.64

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Solution

The fourth proportional to 385,392.60, 578,144.02 and 119,173.64 is: 178,777.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,392.60 : 578,144.02 = 119,173.64 : x
  2. Step 2: Convert to fraction form
    385,392.60/578,144.02 = 119,173.64/x
  3. Step 3: Cross multiply
    385,392.60x = 578,144.02 × 119,173.64
  4. Step 4: Simplify right side
    385,392.60x = 68,899,527,605.57
  5. Step 5: Solve for x
    x = 68,899,527,605.57/385,392.60
  6. Step 6: Final answer
    x = 178,777.51

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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.