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Finding the Fourth Proportional to 393,950.20, 590,925.30 and 127,719.40

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Solution

The fourth proportional to 393,950.20, 590,925.30 and 127,719.40 is: 191,579.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,950.20 : 590,925.30 = 127,719.40 : x
  2. Step 2: Convert to fraction form
    393,950.20/590,925.30 = 127,719.40/x
  3. Step 3: Cross multiply
    393,950.20x = 590,925.30 × 127,719.40
  4. Step 4: Simplify right side
    393,950.20x = 75,472,624,760.82
  5. Step 5: Solve for x
    x = 75,472,624,760.82/393,950.20
  6. Step 6: Final answer
    x = 191,579.10

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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.