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Finding the Fourth Proportional to 660,917.64, 991,428.98 and 281,841.60

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Solution

The fourth proportional to 660,917.64, 991,428.98 and 281,841.60 is: 422,784.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,917.64 : 991,428.98 = 281,841.60 : x
  2. Step 2: Convert to fraction form
    660,917.64/991,428.98 = 281,841.60/x
  3. Step 3: Cross multiply
    660,917.64x = 991,428.98 × 281,841.60
  4. Step 4: Simplify right side
    660,917.64x = 279,425,928,600.36
  5. Step 5: Solve for x
    x = 279,425,928,600.36/660,917.64
  6. Step 6: Final answer
    x = 422,784.79

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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.