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Finding the Fourth Proportional to 711,069.02, 981,268.50 and 388,775.69

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Solution

The fourth proportional to 711,069.02, 981,268.50 and 388,775.69 is: 536,506.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,069.02 : 981,268.50 = 388,775.69 : x
  2. Step 2: Convert to fraction form
    711,069.02/981,268.50 = 388,775.69/x
  3. Step 3: Cross multiply
    711,069.02x = 981,268.50 × 388,775.69
  4. Step 4: Simplify right side
    711,069.02x = 381,493,338,162.77
  5. Step 5: Solve for x
    x = 381,493,338,162.77/711,069.02
  6. Step 6: Final answer
    x = 536,506.76

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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.