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Finding the Fourth Proportional to 720,998.42, 1,081,403.76 and 188,560.51

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Solution

The fourth proportional to 720,998.42, 1,081,403.76 and 188,560.51 is: 282,816.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,998.42 : 1,081,403.76 = 188,560.51 : x
  2. Step 2: Convert to fraction form
    720,998.42/1,081,403.76 = 188,560.51/x
  3. Step 3: Cross multiply
    720,998.42x = 1,081,403.76 × 188,560.51
  4. Step 4: Simplify right side
    720,998.42x = 203,910,039,094.50
  5. Step 5: Solve for x
    x = 203,910,039,094.50/720,998.42
  6. Step 6: Final answer
    x = 282,816.21

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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.