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Finding the Fourth Proportional to 720,192.93, 993,781.54 and 397,883.81

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Solution

The fourth proportional to 720,192.93, 993,781.54 and 397,883.81 is: 549,032.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,192.93 : 993,781.54 = 397,883.81 : x
  2. Step 2: Convert to fraction form
    720,192.93/993,781.54 = 397,883.81/x
  3. Step 3: Cross multiply
    720,192.93x = 993,781.54 × 397,883.81
  4. Step 4: Simplify right side
    720,192.93x = 395,409,585,442.87
  5. Step 5: Solve for x
    x = 395,409,585,442.87/720,192.93
  6. Step 6: Final answer
    x = 549,032.86

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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.