Home / 711,080.11-981,290.64-388,790.43

Finding the Fourth Proportional to 711,080.11, 981,290.64 and 388,790.43

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Solution

The fourth proportional to 711,080.11, 981,290.64 and 388,790.43 is: 536,530.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,080.11 : 981,290.64 = 388,790.43 : x
  2. Step 2: Convert to fraction form
    711,080.11/981,290.64 = 388,790.43/x
  3. Step 3: Cross multiply
    711,080.11x = 981,290.64 × 388,790.43
  4. Step 4: Simplify right side
    711,080.11x = 381,516,409,880.58
  5. Step 5: Solve for x
    x = 381,516,409,880.58/711,080.11
  6. Step 6: Final answer
    x = 536,530.84

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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.