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Finding the Fourth Proportional to 874,659.79, 1,206,993.21 and 487,454.60

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Solution

The fourth proportional to 874,659.79, 1,206,993.21 and 487,454.60 is: 672,666.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    874,659.79 : 1,206,993.21 = 487,454.60 : x
  2. Step 2: Convert to fraction form
    874,659.79/1,206,993.21 = 487,454.60/x
  3. Step 3: Cross multiply
    874,659.79x = 1,206,993.21 × 487,454.60
  4. Step 4: Simplify right side
    874,659.79x = 588,354,392,383.27
  5. Step 5: Solve for x
    x = 588,354,392,383.27/874,659.79
  6. Step 6: Final answer
    x = 672,666.56

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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.