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Finding the Fourth Proportional to 311,548.29, 429,956.90 and 173,742.76

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Solution

The fourth proportional to 311,548.29, 429,956.90 and 173,742.76 is: 239,776.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,548.29 : 429,956.90 = 173,742.76 : x
  2. Step 2: Convert to fraction form
    311,548.29/429,956.90 = 173,742.76/x
  3. Step 3: Cross multiply
    311,548.29x = 429,956.90 × 173,742.76
  4. Step 4: Simplify right side
    311,548.29x = 74,701,898,487.04
  5. Step 5: Solve for x
    x = 74,701,898,487.04/311,548.29
  6. Step 6: Final answer
    x = 239,776.31

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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.