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Finding the Fourth Proportional to 720,171.64, 1,080,243.54 and 215,074.84

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Solution

The fourth proportional to 720,171.64, 1,080,243.54 and 215,074.84 is: 322,608.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,171.64 : 1,080,243.54 = 215,074.84 : x
  2. Step 2: Convert to fraction form
    720,171.64/1,080,243.54 = 215,074.84/x
  3. Step 3: Cross multiply
    720,171.64x = 1,080,243.54 × 215,074.84
  4. Step 4: Simplify right side
    720,171.64x = 232,333,206,526.53
  5. Step 5: Solve for x
    x = 232,333,206,526.53/720,171.64
  6. Step 6: Final answer
    x = 322,608.10

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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.