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Finding the Fourth Proportional to 261,135.30, 358,019.84 and 256,411.38

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Solution

The fourth proportional to 261,135.30, 358,019.84 and 256,411.38 is: 351,543.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,135.30 : 358,019.84 = 256,411.38 : x
  2. Step 2: Convert to fraction form
    261,135.30/358,019.84 = 256,411.38/x
  3. Step 3: Cross multiply
    261,135.30x = 358,019.84 × 256,411.38
  4. Step 4: Simplify right side
    261,135.30x = 91,800,361,241.78
  5. Step 5: Solve for x
    x = 91,800,361,241.78/261,135.30
  6. Step 6: Final answer
    x = 351,543.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.