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Finding the Fourth Proportional to 826,626.90, 1,239,940.35 and 354,234.90

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Solution

The fourth proportional to 826,626.90, 1,239,940.35 and 354,234.90 is: 531,352.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    826,626.90 : 1,239,940.35 = 354,234.90 : x
  2. Step 2: Convert to fraction form
    826,626.90/1,239,940.35 = 354,234.90/x
  3. Step 3: Cross multiply
    826,626.90x = 1,239,940.35 × 354,234.90
  4. Step 4: Simplify right side
    826,626.90x = 439,230,145,888.22
  5. Step 5: Solve for x
    x = 439,230,145,888.22/826,626.90
  6. Step 6: Final answer
    x = 531,352.35

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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.