Home / 711,103.05-981,430.83-405,178.20

Finding the Fourth Proportional to 711,103.05, 981,430.83 and 405,178.20

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Solution

The fourth proportional to 711,103.05, 981,430.83 and 405,178.20 is: 559,207.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,103.05 : 981,430.83 = 405,178.20 : x
  2. Step 2: Convert to fraction form
    711,103.05/981,430.83 = 405,178.20/x
  3. Step 3: Cross multiply
    711,103.05x = 981,430.83 × 405,178.20
  4. Step 4: Simplify right side
    711,103.05x = 397,654,377,123.91
  5. Step 5: Solve for x
    x = 397,654,377,123.91/711,103.05
  6. Step 6: Final answer
    x = 559,207.81

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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.