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Finding the Fourth Proportional to 554,057.71, 764,589.26 and 312,340.45

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Solution

The fourth proportional to 554,057.71, 764,589.26 and 312,340.45 is: 431,023.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,057.71 : 764,589.26 = 312,340.45 : x
  2. Step 2: Convert to fraction form
    554,057.71/764,589.26 = 312,340.45/x
  3. Step 3: Cross multiply
    554,057.71x = 764,589.26 × 312,340.45
  4. Step 4: Simplify right side
    554,057.71x = 238,812,151,971.87
  5. Step 5: Solve for x
    x = 238,812,151,971.87/554,057.71
  6. Step 6: Final answer
    x = 431,023.96

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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.