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Finding the Fourth Proportional to 720,375,484.96, 994,008,233.92 and 406,995,356.16

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Solution

The fourth proportional to 720,375,484.96, 994,008,233.92 and 406,995,356.16 is: 561,591,480.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,375,484.96 : 994,008,233.92 = 406,995,356.16 : x
  2. Step 2: Convert to fraction form
    720,375,484.96/994,008,233.92 = 406,995,356.16/x
  3. Step 3: Cross multiply
    720,375,484.96x = 994,008,233.92 × 406,995,356.16
  4. Step 4: Simplify right side
    720,375,484.96x = 404,556,735,190,243,008
  5. Step 5: Solve for x
    x = 404,556,735,190,243,008/720,375,484.96
  6. Step 6: Final answer
    x = 561,591,480.61

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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.