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Finding the Fourth Proportional to 708,963.92, 978,201.93 and 403,016.12

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Solution

The fourth proportional to 708,963.92, 978,201.93 and 403,016.12 is: 556,066.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,963.92 : 978,201.93 = 403,016.12 : x
  2. Step 2: Convert to fraction form
    708,963.92/978,201.93 = 403,016.12/x
  3. Step 3: Cross multiply
    708,963.92x = 978,201.93 × 403,016.12
  4. Step 4: Simplify right side
    708,963.92x = 394,231,146,405.11
  5. Step 5: Solve for x
    x = 394,231,146,405.11/708,963.92
  6. Step 6: Final answer
    x = 556,066.59

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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.