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Finding the Fourth Proportional to 713,979.82, 985,229.40 and 407,995.48

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Solution

The fourth proportional to 713,979.82, 985,229.40 and 407,995.48 is: 562,997.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,979.82 : 985,229.40 = 407,995.48 : x
  2. Step 2: Convert to fraction form
    713,979.82/985,229.40 = 407,995.48/x
  3. Step 3: Cross multiply
    713,979.82x = 985,229.40 × 407,995.48
  4. Step 4: Simplify right side
    713,979.82x = 401,969,141,963.11
  5. Step 5: Solve for x
    x = 401,969,141,963.11/713,979.82
  6. Step 6: Final answer
    x = 562,997.90

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Similar ratio
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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.