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Finding the Fourth Proportional to 715,997.80, 988,071.78 and 410,141.80

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Solution

The fourth proportional to 715,997.80, 988,071.78 and 410,141.80 is: 565,992.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,997.80 : 988,071.78 = 410,141.80 : x
  2. Step 2: Convert to fraction form
    715,997.80/988,071.78 = 410,141.80/x
  3. Step 3: Cross multiply
    715,997.80x = 988,071.78 × 410,141.80
  4. Step 4: Simplify right side
    715,997.80x = 405,249,538,378.40
  5. Step 5: Solve for x
    x = 405,249,538,378.40/715,997.80
  6. Step 6: Final answer
    x = 565,992.71

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Similar ratio
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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.