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Finding the Fourth Proportional to 561,356.61, 774,672.96 and 319,639.38

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Solution

The fourth proportional to 561,356.61, 774,672.96 and 319,639.38 is: 441,102.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,356.61 : 774,672.96 = 319,639.38 : x
  2. Step 2: Convert to fraction form
    561,356.61/774,672.96 = 319,639.38/x
  3. Step 3: Cross multiply
    561,356.61x = 774,672.96 × 319,639.38
  4. Step 4: Simplify right side
    561,356.61x = 247,615,984,637.17
  5. Step 5: Solve for x
    x = 247,615,984,637.17/561,356.61
  6. Step 6: Final answer
    x = 441,102.82

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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.