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Finding the Fourth Proportional to 617,121.70, 851,706.72 and 345,204.70

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Solution

The fourth proportional to 617,121.70, 851,706.72 and 345,204.70 is: 476,426.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    617,121.70 : 851,706.72 = 345,204.70 : x
  2. Step 2: Convert to fraction form
    617,121.70/851,706.72 = 345,204.70/x
  3. Step 3: Cross multiply
    617,121.70x = 851,706.72 × 345,204.70
  4. Step 4: Simplify right side
    617,121.70x = 294,013,162,765.58
  5. Step 5: Solve for x
    x = 294,013,162,765.58/617,121.70
  6. Step 6: Final answer
    x = 476,426.55

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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.