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Finding the Fourth Proportional to 485,859.78, 670,484.72 and 270,999.66

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Solution

The fourth proportional to 485,859.78, 670,484.72 and 270,999.66 is: 373,978.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,859.78 : 670,484.72 = 270,999.66 : x
  2. Step 2: Convert to fraction form
    485,859.78/670,484.72 = 270,999.66/x
  3. Step 3: Cross multiply
    485,859.78x = 670,484.72 × 270,999.66
  4. Step 4: Simplify right side
    485,859.78x = 181,701,131,155.20
  5. Step 5: Solve for x
    x = 181,701,131,155.20/485,859.78
  6. Step 6: Final answer
    x = 373,978.54

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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.