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Finding the Fourth Proportional to 312,440.41, 431,166.90 and 169,200.42

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Solution

The fourth proportional to 312,440.41, 431,166.90 and 169,200.42 is: 233,496.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,440.41 : 431,166.90 = 169,200.42 : x
  2. Step 2: Convert to fraction form
    312,440.41/431,166.90 = 169,200.42/x
  3. Step 3: Cross multiply
    312,440.41x = 431,166.90 × 169,200.42
  4. Step 4: Simplify right side
    312,440.41x = 72,953,620,570.10
  5. Step 5: Solve for x
    x = 72,953,620,570.10/312,440.41
  6. Step 6: Final answer
    x = 233,496.11

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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.