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Finding the Fourth Proportional to 485,887.96, 670,542.06 and 281,923.48

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Solution

The fourth proportional to 485,887.96, 670,542.06 and 281,923.48 is: 389,064.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,887.96 : 670,542.06 = 281,923.48 : x
  2. Step 2: Convert to fraction form
    485,887.96/670,542.06 = 281,923.48/x
  3. Step 3: Cross multiply
    485,887.96x = 670,542.06 × 281,923.48
  4. Step 4: Simplify right side
    485,887.96x = 189,041,551,041.57
  5. Step 5: Solve for x
    x = 189,041,551,041.57/485,887.96
  6. Step 6: Final answer
    x = 389,064.08

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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.