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Finding the Fourth Proportional to 559,218.81, 771,694.45 and 317,469.65

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Solution

The fourth proportional to 559,218.81, 771,694.45 and 317,469.65 is: 438,092.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    559,218.81 : 771,694.45 = 317,469.65 : x
  2. Step 2: Convert to fraction form
    559,218.81/771,694.45 = 317,469.65/x
  3. Step 3: Cross multiply
    559,218.81x = 771,694.45 × 317,469.65
  4. Step 4: Simplify right side
    559,218.81x = 244,989,565,361.09
  5. Step 5: Solve for x
    x = 244,989,565,361.09/559,218.81
  6. Step 6: Final answer
    x = 438,092.50

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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.