Home / 628,219.86-941,971.68-428,781.66

Finding the Fourth Proportional to 628,219.86, 941,971.68 and 428,781.66

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Solution

The fourth proportional to 628,219.86, 941,971.68 and 428,781.66 is: 642,928.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,219.86 : 941,971.68 = 428,781.66 : x
  2. Step 2: Convert to fraction form
    628,219.86/941,971.68 = 428,781.66/x
  3. Step 3: Cross multiply
    628,219.86x = 941,971.68 × 428,781.66
  4. Step 4: Simplify right side
    628,219.86x = 403,900,180,623.39
  5. Step 5: Solve for x
    x = 403,900,180,623.39/628,219.86
  6. Step 6: Final answer
    x = 642,928.07

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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.