Home / 711,517.28-981,885.87-389,223.54

Finding the Fourth Proportional to 711,517.28, 981,885.87 and 389,223.54

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Solution

The fourth proportional to 711,517.28, 981,885.87 and 389,223.54 is: 537,124.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,517.28 : 981,885.87 = 389,223.54 : x
  2. Step 2: Convert to fraction form
    711,517.28/981,885.87 = 389,223.54/x
  3. Step 3: Cross multiply
    711,517.28x = 981,885.87 × 389,223.54
  4. Step 4: Simplify right side
    711,517.28x = 382,173,094,197.38
  5. Step 5: Solve for x
    x = 382,173,094,197.38/711,517.28
  6. Step 6: Final answer
    x = 537,124.13

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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.