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Finding the Fourth Proportional to 261,285.40, 391,344.90 and 201,653.20

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Solution

The fourth proportional to 261,285.40, 391,344.90 and 201,653.20 is: 302,029.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,285.40 : 391,344.90 = 201,653.20 : x
  2. Step 2: Convert to fraction form
    261,285.40/391,344.90 = 201,653.20/x
  3. Step 3: Cross multiply
    261,285.40x = 391,344.90 × 201,653.20
  4. Step 4: Simplify right side
    261,285.40x = 78,915,951,388.68
  5. Step 5: Solve for x
    x = 78,915,951,388.68/261,285.40
  6. Step 6: Final answer
    x = 302,029.70

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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.