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Finding the Fourth Proportional to 438,970.78, 605,779.46 and 257,682.71

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Solution

The fourth proportional to 438,970.78, 605,779.46 and 257,682.71 is: 355,602.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,970.78 : 605,779.46 = 257,682.71 : x
  2. Step 2: Convert to fraction form
    438,970.78/605,779.46 = 257,682.71/x
  3. Step 3: Cross multiply
    438,970.78x = 605,779.46 × 257,682.71
  4. Step 4: Simplify right side
    438,970.78x = 156,098,894,129.72
  5. Step 5: Solve for x
    x = 156,098,894,129.72/438,970.78
  6. Step 6: Final answer
    x = 355,602.01

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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.