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Finding the Fourth Proportional to 374,447.70, 561,671.55 and 285,874.20

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Solution

The fourth proportional to 374,447.70, 561,671.55 and 285,874.20 is: 428,811.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    374,447.70 : 561,671.55 = 285,874.20 : x
  2. Step 2: Convert to fraction form
    374,447.70/561,671.55 = 285,874.20/x
  3. Step 3: Cross multiply
    374,447.70x = 561,671.55 × 285,874.20
  4. Step 4: Simplify right side
    374,447.70x = 160,567,405,019.01
  5. Step 5: Solve for x
    x = 160,567,405,019.01/374,447.70
  6. Step 6: Final answer
    x = 428,811.30

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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.