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Finding the Fourth Proportional to 617,907.90, 926,861.85 and 218,999.10

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Solution

The fourth proportional to 617,907.90, 926,861.85 and 218,999.10 is: 328,498.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    617,907.90 : 926,861.85 = 218,999.10 : x
  2. Step 2: Convert to fraction form
    617,907.90/926,861.85 = 218,999.10/x
  3. Step 3: Cross multiply
    617,907.90x = 926,861.85 × 218,999.10
  4. Step 4: Simplify right side
    617,907.90x = 202,981,910,974.34
  5. Step 5: Solve for x
    x = 202,981,910,974.34/617,907.90
  6. Step 6: Final answer
    x = 328,498.65

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.