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Finding the Fourth Proportional to 489,787.40, 734,637.90 and 134,769.80

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Solution

The fourth proportional to 489,787.40, 734,637.90 and 134,769.80 is: 202,142.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,787.40 : 734,637.90 = 134,769.80 : x
  2. Step 2: Convert to fraction form
    489,787.40/734,637.90 = 134,769.80/x
  3. Step 3: Cross multiply
    489,787.40x = 734,637.90 × 134,769.80
  4. Step 4: Simplify right side
    489,787.40x = 99,007,002,855.42
  5. Step 5: Solve for x
    x = 99,007,002,855.42/489,787.40
  6. Step 6: Final answer
    x = 202,142.81

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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.