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Finding the Fourth Proportional to 438,568.52, 605,035.86 and 257,335.88

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Solution

The fourth proportional to 438,568.52, 605,035.86 and 257,335.88 is: 355,012.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,568.52 : 605,035.86 = 257,335.88 : x
  2. Step 2: Convert to fraction form
    438,568.52/605,035.86 = 257,335.88/x
  3. Step 3: Cross multiply
    438,568.52x = 605,035.86 × 257,335.88
  4. Step 4: Simplify right side
    438,568.52x = 155,697,435,464.66
  5. Step 5: Solve for x
    x = 155,697,435,464.66/438,568.52
  6. Step 6: Final answer
    x = 355,012.79

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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.