Home / 711,389.58-981,749.07-409,680.78

Finding the Fourth Proportional to 711,389.58, 981,749.07 and 409,680.78

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Solution

The fourth proportional to 711,389.58, 981,749.07 and 409,680.78 is: 565,377.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,389.58 : 981,749.07 = 409,680.78 : x
  2. Step 2: Convert to fraction form
    711,389.58/981,749.07 = 409,680.78/x
  3. Step 3: Cross multiply
    711,389.58x = 981,749.07 × 409,680.78
  4. Step 4: Simplify right side
    711,389.58x = 402,203,724,761.88
  5. Step 5: Solve for x
    x = 402,203,724,761.88/711,389.58
  6. Step 6: Final answer
    x = 565,377.59

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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.