Home / 805,215.70-1,207,823.55-331,657.30

Finding the Fourth Proportional to 805,215.70, 1,207,823.55 and 331,657.30

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Solution

The fourth proportional to 805,215.70, 1,207,823.55 and 331,657.30 is: 497,485.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    805,215.70 : 1,207,823.55 = 331,657.30 : x
  2. Step 2: Convert to fraction form
    805,215.70/1,207,823.55 = 331,657.30/x
  3. Step 3: Cross multiply
    805,215.70x = 1,207,823.55 × 331,657.30
  4. Step 4: Simplify right side
    805,215.70x = 400,583,497,469.42
  5. Step 5: Solve for x
    x = 400,583,497,469.42/805,215.70
  6. Step 6: Final answer
    x = 497,485.95

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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.