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Finding the Fourth Proportional to 660,572.82, 990,742.59 and 261,080.82

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Solution

The fourth proportional to 660,572.82, 990,742.59 and 261,080.82 is: 391,575.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,572.82 : 990,742.59 = 261,080.82 : x
  2. Step 2: Convert to fraction form
    660,572.82/990,742.59 = 261,080.82/x
  3. Step 3: Cross multiply
    660,572.82x = 990,742.59 × 261,080.82
  4. Step 4: Simplify right side
    660,572.82x = 258,663,887,806.12
  5. Step 5: Solve for x
    x = 258,663,887,806.12/660,572.82
  6. Step 6: Final answer
    x = 391,575.13

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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.