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Finding the Fourth Proportional to 881,161, 1,216,005.42 and 478,753

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Solution

The fourth proportional to 881,161, 1,216,005.42 and 478,753 is: 660,680.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    881,161 : 1,216,005.42 = 478,753 : x
  2. Step 2: Convert to fraction form
    881,161/1,216,005.42 = 478,753/x
  3. Step 3: Cross multiply
    881,161x = 1,216,005.42 × 478,753
  4. Step 4: Simplify right side
    881,161x = 582,166,242,841.26
  5. Step 5: Solve for x
    x = 582,166,242,841.26/881,161
  6. Step 6: Final answer
    x = 660,680.90

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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.