Home / 711,168.12-981,331.40-420,788.59

Finding the Fourth Proportional to 711,168.12, 981,331.40 and 420,788.59

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Solution

The fourth proportional to 711,168.12, 981,331.40 and 420,788.59 is: 580,640.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,168.12 : 981,331.40 = 420,788.59 : x
  2. Step 2: Convert to fraction form
    711,168.12/981,331.40 = 420,788.59/x
  3. Step 3: Cross multiply
    711,168.12x = 981,331.40 × 420,788.59
  4. Step 4: Simplify right side
    711,168.12x = 412,933,054,727.37
  5. Step 5: Solve for x
    x = 412,933,054,727.37/711,168.12
  6. Step 6: Final answer
    x = 580,640.56

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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.