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Finding the Fourth Proportional to 420,355.84, 630,527.07 and 195,590.56

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Solution

The fourth proportional to 420,355.84, 630,527.07 and 195,590.56 is: 293,382.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,355.84 : 630,527.07 = 195,590.56 : x
  2. Step 2: Convert to fraction form
    420,355.84/630,527.07 = 195,590.56/x
  3. Step 3: Cross multiply
    420,355.84x = 630,527.07 × 195,590.56
  4. Step 4: Simplify right side
    420,355.84x = 123,325,142,716.46
  5. Step 5: Solve for x
    x = 123,325,142,716.46/420,355.84
  6. Step 6: Final answer
    x = 293,382.73

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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.