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Finding the Fourth Proportional to 404,356.95, 558,078.63 and 243,300.81

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Solution

The fourth proportional to 404,356.95, 558,078.63 and 243,300.81 is: 335,794.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    404,356.95 : 558,078.63 = 243,300.81 : x
  2. Step 2: Convert to fraction form
    404,356.95/558,078.63 = 243,300.81/x
  3. Step 3: Cross multiply
    404,356.95x = 558,078.63 × 243,300.81
  4. Step 4: Simplify right side
    404,356.95x = 135,780,982,722.69
  5. Step 5: Solve for x
    x = 135,780,982,722.69/404,356.95
  6. Step 6: Final answer
    x = 335,794.85

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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.