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Finding the Fourth Proportional to 374,458.10, 561,687.15 and 215,025.80

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Solution

The fourth proportional to 374,458.10, 561,687.15 and 215,025.80 is: 322,538.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    374,458.10 : 561,687.15 = 215,025.80 : x
  2. Step 2: Convert to fraction form
    374,458.10/561,687.15 = 215,025.80/x
  3. Step 3: Cross multiply
    374,458.10x = 561,687.15 × 215,025.80
  4. Step 4: Simplify right side
    374,458.10x = 120,777,228,778.47
  5. Step 5: Solve for x
    x = 120,777,228,778.47/374,458.10
  6. Step 6: Final answer
    x = 322,538.70

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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.