Home / 711,076.86-981,286.15-388,787.18

Finding the Fourth Proportional to 711,076.86, 981,286.15 and 388,787.18

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Solution

The fourth proportional to 711,076.86, 981,286.15 and 388,787.18 is: 536,526.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,076.86 : 981,286.15 = 388,787.18 : x
  2. Step 2: Convert to fraction form
    711,076.86/981,286.15 = 388,787.18/x
  3. Step 3: Cross multiply
    711,076.86x = 981,286.15 × 388,787.18
  4. Step 4: Simplify right side
    711,076.86x = 381,511,470,125.13
  5. Step 5: Solve for x
    x = 381,511,470,125.13/711,076.86
  6. Step 6: Final answer
    x = 536,526.35

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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.