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Finding the Fourth Proportional to 368,818.89, 508,965.21 and 207,689.85

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Solution

The fourth proportional to 368,818.89, 508,965.21 and 207,689.85 is: 286,609.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,818.89 : 508,965.21 = 207,689.85 : x
  2. Step 2: Convert to fraction form
    368,818.89/508,965.21 = 207,689.85/x
  3. Step 3: Cross multiply
    368,818.89x = 508,965.21 × 207,689.85
  4. Step 4: Simplify right side
    368,818.89x = 105,706,908,120.12
  5. Step 5: Solve for x
    x = 105,706,908,120.12/368,818.89
  6. Step 6: Final answer
    x = 286,609.26

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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.