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Finding the Fourth Proportional to 478,994.96, 661,029.01 and 261,215.55

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Solution

The fourth proportional to 478,994.96, 661,029.01 and 261,215.55 is: 360,486.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,994.96 : 661,029.01 = 261,215.55 : x
  2. Step 2: Convert to fraction form
    478,994.96/661,029.01 = 261,215.55/x
  3. Step 3: Cross multiply
    478,994.96x = 661,029.01 × 261,215.55
  4. Step 4: Simplify right side
    478,994.96x = 172,671,056,413.11
  5. Step 5: Solve for x
    x = 172,671,056,413.11/478,994.96
  6. Step 6: Final answer
    x = 360,486.17

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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.