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Finding the Fourth Proportional to 311,695.63, 429,940.51 and 216,167.47

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Solution

The fourth proportional to 311,695.63, 429,940.51 and 216,167.47 is: 298,172.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,695.63 : 429,940.51 = 216,167.47 : x
  2. Step 2: Convert to fraction form
    311,695.63/429,940.51 = 216,167.47/x
  3. Step 3: Cross multiply
    311,695.63x = 429,940.51 × 216,167.47
  4. Step 4: Simplify right side
    311,695.63x = 92,939,152,297.21
  5. Step 5: Solve for x
    x = 92,939,152,297.21/311,695.63
  6. Step 6: Final answer
    x = 298,172.78

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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.