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Finding the Fourth Proportional to 319,939.90, 479,218.65 and 264,643.90

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Solution

The fourth proportional to 319,939.90, 479,218.65 and 264,643.90 is: 396,394.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,939.90 : 479,218.65 = 264,643.90 : x
  2. Step 2: Convert to fraction form
    319,939.90/479,218.65 = 264,643.90/x
  3. Step 3: Cross multiply
    319,939.90x = 479,218.65 × 264,643.90
  4. Step 4: Simplify right side
    319,939.90x = 126,822,292,488.74
  5. Step 5: Solve for x
    x = 126,822,292,488.74/319,939.90
  6. Step 6: Final answer
    x = 396,394.11

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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.