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Finding the Fourth Proportional to 368,129.61, 508,019.72 and 206,986.05

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Solution

The fourth proportional to 368,129.61, 508,019.72 and 206,986.05 is: 285,641.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,129.61 : 508,019.72 = 206,986.05 : x
  2. Step 2: Convert to fraction form
    368,129.61/508,019.72 = 206,986.05/x
  3. Step 3: Cross multiply
    368,129.61x = 508,019.72 × 206,986.05
  4. Step 4: Simplify right side
    368,129.61x = 105,152,994,129.98
  5. Step 5: Solve for x
    x = 105,152,994,129.98/368,129.61
  6. Step 6: Final answer
    x = 285,641.23

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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.