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Finding the Fourth Proportional to 561,371.21, 774,699.69 and 319,654.76

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Solution

The fourth proportional to 561,371.21, 774,699.69 and 319,654.76 is: 441,127.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,371.21 : 774,699.69 = 319,654.76 : x
  2. Step 2: Convert to fraction form
    561,371.21/774,699.69 = 319,654.76/x
  3. Step 3: Cross multiply
    561,371.21x = 774,699.69 × 319,654.76
  4. Step 4: Simplify right side
    561,371.21x = 247,636,443,479.02
  5. Step 5: Solve for x
    x = 247,636,443,479.02/561,371.21
  6. Step 6: Final answer
    x = 441,127.79

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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.