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Finding the Fourth Proportional to 261,049.70, 391,574.55 and 219,715.40

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Solution

The fourth proportional to 261,049.70, 391,574.55 and 219,715.40 is: 329,573.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,049.70 : 391,574.55 = 219,715.40 : x
  2. Step 2: Convert to fraction form
    261,049.70/391,574.55 = 219,715.40/x
  3. Step 3: Cross multiply
    261,049.70x = 391,574.55 × 219,715.40
  4. Step 4: Simplify right side
    261,049.70x = 86,034,958,883.07
  5. Step 5: Solve for x
    x = 86,034,958,883.07/261,049.70
  6. Step 6: Final answer
    x = 329,573.10

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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.