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Finding the Fourth Proportional to 717,660, 990,370.80 and 416,028.96

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Solution

The fourth proportional to 717,660, 990,370.80 and 416,028.96 is: 574,119.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,660 : 990,370.80 = 416,028.96 : x
  2. Step 2: Convert to fraction form
    717,660/990,370.80 = 416,028.96/x
  3. Step 3: Cross multiply
    717,660x = 990,370.80 × 416,028.96
  4. Step 4: Simplify right side
    717,660x = 412,022,933,938.37
  5. Step 5: Solve for x
    x = 412,022,933,938.37/717,660
  6. Step 6: Final answer
    x = 574,119.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.