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Finding the Fourth Proportional to 662,139.40, 992,625.90 and 396,005.80

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Solution

The fourth proportional to 662,139.40, 992,625.90 and 396,005.80 is: 593,659.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,139.40 : 992,625.90 = 396,005.80 : x
  2. Step 2: Convert to fraction form
    662,139.40/992,625.90 = 396,005.80/x
  3. Step 3: Cross multiply
    662,139.40x = 992,625.90 × 396,005.80
  4. Step 4: Simplify right side
    662,139.40x = 393,085,613,630.22
  5. Step 5: Solve for x
    x = 393,085,613,630.22/662,139.40
  6. Step 6: Final answer
    x = 593,659.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.