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Finding the Fourth Proportional to 554,231.05, 764,773.86 and 312,499.20

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Solution

The fourth proportional to 554,231.05, 764,773.86 and 312,499.20 is: 431,212.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,231.05 : 764,773.86 = 312,499.20 : x
  2. Step 2: Convert to fraction form
    554,231.05/764,773.86 = 312,499.20/x
  3. Step 3: Cross multiply
    554,231.05x = 764,773.86 × 312,499.20
  4. Step 4: Simplify right side
    554,231.05x = 238,991,223,470.69
  5. Step 5: Solve for x
    x = 238,991,223,470.69/554,231.05
  6. Step 6: Final answer
    x = 431,212.26

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1.5x scale

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.