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Finding the Fourth Proportional to 420,998.48, 631,596.96 and 136,667.12

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Solution

The fourth proportional to 420,998.48, 631,596.96 and 136,667.12 is: 205,032.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,998.48 : 631,596.96 = 136,667.12 : x
  2. Step 2: Convert to fraction form
    420,998.48/631,596.96 = 136,667.12/x
  3. Step 3: Cross multiply
    420,998.48x = 631,596.96 × 136,667.12
  4. Step 4: Simplify right side
    420,998.48x = 86,318,537,523.96
  5. Step 5: Solve for x
    x = 86,318,537,523.96/420,998.48
  6. Step 6: Final answer
    x = 205,032.90

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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.