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Finding the Fourth Proportional to 261,765.79, 391,873.64 and 161,603.91

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Solution

The fourth proportional to 261,765.79, 391,873.64 and 161,603.91 is: 241,927.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,765.79 : 391,873.64 = 161,603.91 : x
  2. Step 2: Convert to fraction form
    261,765.79/391,873.64 = 161,603.91/x
  3. Step 3: Cross multiply
    261,765.79x = 391,873.64 × 161,603.91
  4. Step 4: Simplify right side
    261,765.79x = 63,328,311,641.91
  5. Step 5: Solve for x
    x = 63,328,311,641.91/261,765.79
  6. Step 6: Final answer
    x = 241,927.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.