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Finding the Fourth Proportional to 978,553.92, 1,349,154.24 and 633,781.44

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Solution

The fourth proportional to 978,553.92, 1,349,154.24 and 633,781.44 is: 873,808.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,553.92 : 1,349,154.24 = 633,781.44 : x
  2. Step 2: Convert to fraction form
    978,553.92/1,349,154.24 = 633,781.44/x
  3. Step 3: Cross multiply
    978,553.92x = 1,349,154.24 × 633,781.44
  4. Step 4: Simplify right side
    978,553.92x = 855,068,917,009.31
  5. Step 5: Solve for x
    x = 855,068,917,009.31/978,553.92
  6. Step 6: Final answer
    x = 873,808.69

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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.