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Finding the Fourth Proportional to 554,151.22, 764,713.41 and 312,431.69

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Solution

The fourth proportional to 554,151.22, 764,713.41 and 312,431.69 is: 431,147.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,151.22 : 764,713.41 = 312,431.69 : x
  2. Step 2: Convert to fraction form
    554,151.22/764,713.41 = 312,431.69/x
  3. Step 3: Cross multiply
    554,151.22x = 764,713.41 × 312,431.69
  4. Step 4: Simplify right side
    554,151.22x = 238,920,703,792.13
  5. Step 5: Solve for x
    x = 238,920,703,792.13/554,151.22
  6. Step 6: Final answer
    x = 431,147.12

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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.