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Finding the Fourth Proportional to 208,990.14, 288,408.51 and 113,498.70

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Solution

The fourth proportional to 208,990.14, 288,408.51 and 113,498.70 is: 156,629.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,990.14 : 288,408.51 = 113,498.70 : x
  2. Step 2: Convert to fraction form
    208,990.14/288,408.51 = 113,498.70/x
  3. Step 3: Cross multiply
    208,990.14x = 288,408.51 × 113,498.70
  4. Step 4: Simplify right side
    208,990.14x = 32,733,990,953.94
  5. Step 5: Solve for x
    x = 32,733,990,953.94/208,990.14
  6. Step 6: Final answer
    x = 156,629.36

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1.5x scale

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.