Home / 711,201.48-981,418.32-388,847.40

Finding the Fourth Proportional to 711,201.48, 981,418.32 and 388,847.40

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Solution

The fourth proportional to 711,201.48, 981,418.32 and 388,847.40 is: 536,587.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,201.48 : 981,418.32 = 388,847.40 : x
  2. Step 2: Convert to fraction form
    711,201.48/981,418.32 = 388,847.40/x
  3. Step 3: Cross multiply
    711,201.48x = 981,418.32 × 388,847.40
  4. Step 4: Simplify right side
    711,201.48x = 381,621,962,044.37
  5. Step 5: Solve for x
    x = 381,621,962,044.37/711,201.48
  6. Step 6: Final answer
    x = 536,587.69

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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.