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Finding the Fourth Proportional to 708,893.92, 978,331.80 and 403,066.27

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Solution

The fourth proportional to 708,893.92, 978,331.80 and 403,066.27 is: 556,264.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,893.92 : 978,331.80 = 403,066.27 : x
  2. Step 2: Convert to fraction form
    708,893.92/978,331.80 = 403,066.27/x
  3. Step 3: Cross multiply
    708,893.92x = 978,331.80 × 403,066.27
  4. Step 4: Simplify right side
    708,893.92x = 394,332,549,448.39
  5. Step 5: Solve for x
    x = 394,332,549,448.39/708,893.92
  6. Step 6: Final answer
    x = 556,264.54

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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.