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Finding the Fourth Proportional to 718,989.80, 992,196.34 and 396,713.48

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Solution

The fourth proportional to 718,989.80, 992,196.34 and 396,713.48 is: 547,459.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,989.80 : 992,196.34 = 396,713.48 : x
  2. Step 2: Convert to fraction form
    718,989.80/992,196.34 = 396,713.48/x
  3. Step 3: Cross multiply
    718,989.80x = 992,196.34 × 396,713.48
  4. Step 4: Simplify right side
    718,989.80x = 393,617,662,884.66
  5. Step 5: Solve for x
    x = 393,617,662,884.66/718,989.80
  6. Step 6: Final answer
    x = 547,459.31

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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.