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Finding the Fourth Proportional to 981,713.70, 1,355,436 and 751,864.86

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Solution

The fourth proportional to 981,713.70, 1,355,436 and 751,864.86 is: 1,038,087.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    981,713.70 : 1,355,436 = 751,864.86 : x
  2. Step 2: Convert to fraction form
    981,713.70/1,355,436 = 751,864.86/x
  3. Step 3: Cross multiply
    981,713.70x = 1,355,436 × 751,864.86
  4. Step 4: Simplify right side
    981,713.70x = 1,019,104,698,378.96
  5. Step 5: Solve for x
    x = 1,019,104,698,378.96/981,713.70
  6. Step 6: Final answer
    x = 1,038,087.48

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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.