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Finding the Fourth Proportional to 393,956.10, 590,934.15 and 388,051.20

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Solution

The fourth proportional to 393,956.10, 590,934.15 and 388,051.20 is: 582,076.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,956.10 : 590,934.15 = 388,051.20 : x
  2. Step 2: Convert to fraction form
    393,956.10/590,934.15 = 388,051.20/x
  3. Step 3: Cross multiply
    393,956.10x = 590,934.15 × 388,051.20
  4. Step 4: Simplify right side
    393,956.10x = 229,312,706,028.48
  5. Step 5: Solve for x
    x = 229,312,706,028.48/393,956.10
  6. Step 6: Final answer
    x = 582,076.80

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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.