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Finding the Fourth Proportional to 668,860, 922,725.36 and 396,939.34

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Solution

The fourth proportional to 668,860, 922,725.36 and 396,939.34 is: 547,597.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,860 : 922,725.36 = 396,939.34 : x
  2. Step 2: Convert to fraction form
    668,860/922,725.36 = 396,939.34/x
  3. Step 3: Cross multiply
    668,860x = 922,725.36 × 396,939.34
  4. Step 4: Simplify right side
    668,860x = 366,265,995,399.66
  5. Step 5: Solve for x
    x = 366,265,995,399.66/668,860
  6. Step 6: Final answer
    x = 547,597.40

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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.