Home / 420,773.07-631,473.09-308,742.78

Finding the Fourth Proportional to 420,773.07, 631,473.09 and 308,742.78

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Solution

The fourth proportional to 420,773.07, 631,473.09 and 308,742.78 is: 463,344.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,773.07 : 631,473.09 = 308,742.78 : x
  2. Step 2: Convert to fraction form
    420,773.07/631,473.09 = 308,742.78/x
  3. Step 3: Cross multiply
    420,773.07x = 631,473.09 × 308,742.78
  4. Step 4: Simplify right side
    420,773.07x = 194,962,757,301.79
  5. Step 5: Solve for x
    x = 194,962,757,301.79/420,773.07
  6. Step 6: Final answer
    x = 463,344.19

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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.