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Finding the Fourth Proportional to 311,325.12, 429,631.20 and 177,197.76

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Solution

The fourth proportional to 311,325.12, 429,631.20 and 177,197.76 is: 244,534.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,325.12 : 429,631.20 = 177,197.76 : x
  2. Step 2: Convert to fraction form
    311,325.12/429,631.20 = 177,197.76/x
  3. Step 3: Cross multiply
    311,325.12x = 429,631.20 × 177,197.76
  4. Step 4: Simplify right side
    311,325.12x = 76,129,686,266.11
  5. Step 5: Solve for x
    x = 76,129,686,266.11/311,325.12
  6. Step 6: Final answer
    x = 244,534.35

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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.