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Finding the Fourth Proportional to 420,484.86, 630,912.06 and 220,758.84

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Solution

The fourth proportional to 420,484.86, 630,912.06 and 220,758.84 is: 331,235.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,484.86 : 630,912.06 = 220,758.84 : x
  2. Step 2: Convert to fraction form
    420,484.86/630,912.06 = 220,758.84/x
  3. Step 3: Cross multiply
    420,484.86x = 630,912.06 × 220,758.84
  4. Step 4: Simplify right side
    420,484.86x = 139,279,414,507.61
  5. Step 5: Solve for x
    x = 139,279,414,507.61/420,484.86
  6. Step 6: Final answer
    x = 331,235.27

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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.