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Finding the Fourth Proportional to 660,546.28, 990,819.42 and 286,561

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Solution

The fourth proportional to 660,546.28, 990,819.42 and 286,561 is: 429,841.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,546.28 : 990,819.42 = 286,561 : x
  2. Step 2: Convert to fraction form
    660,546.28/990,819.42 = 286,561/x
  3. Step 3: Cross multiply
    660,546.28x = 990,819.42 × 286,561
  4. Step 4: Simplify right side
    660,546.28x = 283,930,203,814.62
  5. Step 5: Solve for x
    x = 283,930,203,814.62/660,546.28
  6. Step 6: Final answer
    x = 429,841.50

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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.