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Finding the Fourth Proportional to 807,788.90, 1,211,683.35 and 409,657.70

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Solution

The fourth proportional to 807,788.90, 1,211,683.35 and 409,657.70 is: 614,486.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    807,788.90 : 1,211,683.35 = 409,657.70 : x
  2. Step 2: Convert to fraction form
    807,788.90/1,211,683.35 = 409,657.70/x
  3. Step 3: Cross multiply
    807,788.90x = 1,211,683.35 × 409,657.70
  4. Step 4: Simplify right side
    807,788.90x = 496,375,414,289.30
  5. Step 5: Solve for x
    x = 496,375,414,289.30/807,788.90
  6. Step 6: Final answer
    x = 614,486.55

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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.