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Finding the Fourth Proportional to 355,691.20, 490,919.52 and 228,525.76

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Solution

The fourth proportional to 355,691.20, 490,919.52 and 228,525.76 is: 315,407.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,691.20 : 490,919.52 = 228,525.76 : x
  2. Step 2: Convert to fraction form
    355,691.20/490,919.52 = 228,525.76/x
  3. Step 3: Cross multiply
    355,691.20x = 490,919.52 × 228,525.76
  4. Step 4: Simplify right side
    355,691.20x = 112,187,756,406.84
  5. Step 5: Solve for x
    x = 112,187,756,406.84/355,691.20
  6. Step 6: Final answer
    x = 315,407.74

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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.