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Finding the Fourth Proportional to 400,994.48, 553,386.15 and 219,705.86

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Solution

The fourth proportional to 400,994.48, 553,386.15 and 219,705.86 is: 303,201.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,994.48 : 553,386.15 = 219,705.86 : x
  2. Step 2: Convert to fraction form
    400,994.48/553,386.15 = 219,705.86/x
  3. Step 3: Cross multiply
    400,994.48x = 553,386.15 × 219,705.86
  4. Step 4: Simplify right side
    400,994.48x = 121,582,179,997.84
  5. Step 5: Solve for x
    x = 121,582,179,997.84/400,994.48
  6. Step 6: Final answer
    x = 303,201.63

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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.