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Finding the Fourth Proportional to 438,568.02, 605,035.17 and 257,335.38

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Solution

The fourth proportional to 438,568.02, 605,035.17 and 257,335.38 is: 355,012.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,568.02 : 605,035.17 = 257,335.38 : x
  2. Step 2: Convert to fraction form
    438,568.02/605,035.17 = 257,335.38/x
  3. Step 3: Cross multiply
    438,568.02x = 605,035.17 × 257,335.38
  4. Step 4: Simplify right side
    438,568.02x = 155,696,955,385.32
  5. Step 5: Solve for x
    x = 155,696,955,385.32/438,568.02
  6. Step 6: Final answer
    x = 355,012.10

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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.