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Finding the Fourth Proportional to 438,801.06, 605,610.06 and 257,612.90

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Solution

The fourth proportional to 438,801.06, 605,610.06 and 257,612.90 is: 355,543.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,801.06 : 605,610.06 = 257,612.90 : x
  2. Step 2: Convert to fraction form
    438,801.06/605,610.06 = 257,612.90/x
  3. Step 3: Cross multiply
    438,801.06x = 605,610.06 × 257,612.90
  4. Step 4: Simplify right side
    438,801.06x = 156,012,963,825.77
  5. Step 5: Solve for x
    x = 156,012,963,825.77/438,801.06
  6. Step 6: Final answer
    x = 355,543.73

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1.5x scale

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.