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Finding the Fourth Proportional to 319,356.29, 440,253.90 and 251,255.33

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Solution

The fourth proportional to 319,356.29, 440,253.90 and 251,255.33 is: 346,372.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,356.29 : 440,253.90 = 251,255.33 : x
  2. Step 2: Convert to fraction form
    319,356.29/440,253.90 = 251,255.33/x
  3. Step 3: Cross multiply
    319,356.29x = 440,253.90 × 251,255.33
  4. Step 4: Simplify right side
    319,356.29x = 110,616,140,854.40
  5. Step 5: Solve for x
    x = 110,616,140,854.40/319,356.29
  6. Step 6: Final answer
    x = 346,372.20

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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.