Home / 628,113.12-941,812.76-428,675.12

Finding the Fourth Proportional to 628,113.12, 941,812.76 and 428,675.12

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Solution

The fourth proportional to 628,113.12, 941,812.76 and 428,675.12 is: 642,769.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,113.12 : 941,812.76 = 428,675.12 : x
  2. Step 2: Convert to fraction form
    628,113.12/941,812.76 = 428,675.12/x
  3. Step 3: Cross multiply
    628,113.12x = 941,812.76 × 428,675.12
  4. Step 4: Simplify right side
    628,113.12x = 403,731,691,058.09
  5. Step 5: Solve for x
    x = 403,731,691,058.09/628,113.12
  6. Step 6: Final answer
    x = 642,769.08

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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.