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Finding the Fourth Proportional to 393,429.80, 590,144.70 and 144,079.40

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Solution

The fourth proportional to 393,429.80, 590,144.70 and 144,079.40 is: 216,119.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,429.80 : 590,144.70 = 144,079.40 : x
  2. Step 2: Convert to fraction form
    393,429.80/590,144.70 = 144,079.40/x
  3. Step 3: Cross multiply
    393,429.80x = 590,144.70 × 144,079.40
  4. Step 4: Simplify right side
    393,429.80x = 85,027,694,289.18
  5. Step 5: Solve for x
    x = 85,027,694,289.18/393,429.80
  6. Step 6: Final answer
    x = 216,119.10

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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.