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Finding the Fourth Proportional to 660,182.76, 990,601.38 and 261,109.80

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Solution

The fourth proportional to 660,182.76, 990,601.38 and 261,109.80 is: 391,794.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,182.76 : 990,601.38 = 261,109.80 : x
  2. Step 2: Convert to fraction form
    660,182.76/990,601.38 = 261,109.80/x
  3. Step 3: Cross multiply
    660,182.76x = 990,601.38 × 261,109.80
  4. Step 4: Simplify right side
    660,182.76x = 258,655,728,211.52
  5. Step 5: Solve for x
    x = 258,655,728,211.52/660,182.76
  6. Step 6: Final answer
    x = 391,794.13

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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.