Home / 711,455.62-981,787.88-389,158.78

Finding the Fourth Proportional to 711,455.62, 981,787.88 and 389,158.78

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Solution

The fourth proportional to 711,455.62, 981,787.88 and 389,158.78 is: 537,027.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,455.62 : 981,787.88 = 389,158.78 : x
  2. Step 2: Convert to fraction form
    711,455.62/981,787.88 = 389,158.78/x
  3. Step 3: Cross multiply
    711,455.62x = 981,787.88 × 389,158.78
  4. Step 4: Simplify right side
    711,455.62x = 382,071,366,744.85
  5. Step 5: Solve for x
    x = 382,071,366,744.85/711,455.62
  6. Step 6: Final answer
    x = 537,027.69

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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.