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Finding the Fourth Proportional to 561,717.28, 775,111.26 and 319,949.20

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Solution

The fourth proportional to 561,717.28, 775,111.26 and 319,949.20 is: 441,496.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,717.28 : 775,111.26 = 319,949.20 : x
  2. Step 2: Convert to fraction form
    561,717.28/775,111.26 = 319,949.20/x
  3. Step 3: Cross multiply
    561,717.28x = 775,111.26 × 319,949.20
  4. Step 4: Simplify right side
    561,717.28x = 247,996,227,547.99
  5. Step 5: Solve for x
    x = 247,996,227,547.99/561,717.28
  6. Step 6: Final answer
    x = 441,496.53

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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.