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Finding the Fourth Proportional to 554,152.73, 764,715.48 and 312,433.20

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Solution

The fourth proportional to 554,152.73, 764,715.48 and 312,433.20 is: 431,149.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,152.73 : 764,715.48 = 312,433.20 : x
  2. Step 2: Convert to fraction form
    554,152.73/764,715.48 = 312,433.20/x
  3. Step 3: Cross multiply
    554,152.73x = 764,715.48 × 312,433.20
  4. Step 4: Simplify right side
    554,152.73x = 238,922,504,505.94
  5. Step 5: Solve for x
    x = 238,922,504,505.94/554,152.73
  6. Step 6: Final answer
    x = 431,149.20

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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.