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Finding the Fourth Proportional to 886,920.70, 1,330,381.05 and 255,855.10

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Solution

The fourth proportional to 886,920.70, 1,330,381.05 and 255,855.10 is: 383,782.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    886,920.70 : 1,330,381.05 = 255,855.10 : x
  2. Step 2: Convert to fraction form
    886,920.70/1,330,381.05 = 255,855.10/x
  3. Step 3: Cross multiply
    886,920.70x = 1,330,381.05 × 255,855.10
  4. Step 4: Simplify right side
    886,920.70x = 340,384,776,585.86
  5. Step 5: Solve for x
    x = 340,384,776,585.86/886,920.70
  6. Step 6: Final answer
    x = 383,782.65

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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.