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Finding the Fourth Proportional to 559,412.39, 771,990.07 and 317,694.90

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Solution

The fourth proportional to 559,412.39, 771,990.07 and 317,694.90 is: 438,419.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    559,412.39 : 771,990.07 = 317,694.90 : x
  2. Step 2: Convert to fraction form
    559,412.39/771,990.07 = 317,694.90/x
  3. Step 3: Cross multiply
    559,412.39x = 771,990.07 × 317,694.90
  4. Step 4: Simplify right side
    559,412.39x = 245,257,305,469.67
  5. Step 5: Solve for x
    x = 245,257,305,469.67/559,412.39
  6. Step 6: Final answer
    x = 438,419.51

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.