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Finding the Fourth Proportional to 279,935.40, 419,903.10 and 155,519.40

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Solution

The fourth proportional to 279,935.40, 419,903.10 and 155,519.40 is: 233,279.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,935.40 : 419,903.10 = 155,519.40 : x
  2. Step 2: Convert to fraction form
    279,935.40/419,903.10 = 155,519.40/x
  3. Step 3: Cross multiply
    279,935.40x = 419,903.10 × 155,519.40
  4. Step 4: Simplify right side
    279,935.40x = 65,303,078,170.14
  5. Step 5: Solve for x
    x = 65,303,078,170.14/279,935.40
  6. Step 6: Final answer
    x = 233,279.10

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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.