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Finding the Fourth Proportional to 554,367.85, 764,981.81 and 312,709.82

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Solution

The fourth proportional to 554,367.85, 764,981.81 and 312,709.82 is: 431,513.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,367.85 : 764,981.81 = 312,709.82 : x
  2. Step 2: Convert to fraction form
    554,367.85/764,981.81 = 312,709.82/x
  3. Step 3: Cross multiply
    554,367.85x = 764,981.81 × 312,709.82
  4. Step 4: Simplify right side
    554,367.85x = 239,217,322,206.42
  5. Step 5: Solve for x
    x = 239,217,322,206.42/554,367.85
  6. Step 6: Final answer
    x = 431,513.70

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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.