Home / 711,388.58-981,747.69-409,679.78

Finding the Fourth Proportional to 711,388.58, 981,747.69 and 409,679.78

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Solution

The fourth proportional to 711,388.58, 981,747.69 and 409,679.78 is: 565,376.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,388.58 : 981,747.69 = 409,679.78 : x
  2. Step 2: Convert to fraction form
    711,388.58/981,747.69 = 409,679.78/x
  3. Step 3: Cross multiply
    711,388.58x = 981,747.69 × 409,679.78
  4. Step 4: Simplify right side
    711,388.58x = 402,202,177,654.71
  5. Step 5: Solve for x
    x = 402,202,177,654.71/711,388.58
  6. Step 6: Final answer
    x = 565,376.21

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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.