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Finding the Fourth Proportional to 384,381.06, 576,378.01 and 128,122.89

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Solution

The fourth proportional to 384,381.06, 576,378.01 and 128,122.89 is: 192,119.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    384,381.06 : 576,378.01 = 128,122.89 : x
  2. Step 2: Convert to fraction form
    384,381.06/576,378.01 = 128,122.89/x
  3. Step 3: Cross multiply
    384,381.06x = 576,378.01 × 128,122.89
  4. Step 4: Simplify right side
    384,381.06x = 73,847,216,373.65
  5. Step 5: Solve for x
    x = 73,847,216,373.65/384,381.06
  6. Step 6: Final answer
    x = 192,119.81

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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.