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Finding the Fourth Proportional to 311,818.34, 430,309.35 and 168,578.35

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Solution

The fourth proportional to 311,818.34, 430,309.35 and 168,578.35 is: 232,638.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,818.34 : 430,309.35 = 168,578.35 : x
  2. Step 2: Convert to fraction form
    311,818.34/430,309.35 = 168,578.35/x
  3. Step 3: Cross multiply
    311,818.34x = 430,309.35 × 168,578.35
  4. Step 4: Simplify right side
    311,818.34x = 72,540,839,136.80
  5. Step 5: Solve for x
    x = 72,540,839,136.80/311,818.34
  6. Step 6: Final answer
    x = 232,638.14

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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.