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Finding the Fourth Proportional to 504,426.40, 756,934 and 279,975.20

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Solution

The fourth proportional to 504,426.40, 756,934 and 279,975.20 is: 420,126.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    504,426.40 : 756,934 = 279,975.20 : x
  2. Step 2: Convert to fraction form
    504,426.40/756,934 = 279,975.20/x
  3. Step 3: Cross multiply
    504,426.40x = 756,934 × 279,975.20
  4. Step 4: Simplify right side
    504,426.40x = 211,922,748,036.80
  5. Step 5: Solve for x
    x = 211,922,748,036.80/504,426.40
  6. Step 6: Final answer
    x = 420,126.20

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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.