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Finding the Fourth Proportional to 620,999.20, 931,498.80 and 284,419.90

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Solution

The fourth proportional to 620,999.20, 931,498.80 and 284,419.90 is: 426,629.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,999.20 : 931,498.80 = 284,419.90 : x
  2. Step 2: Convert to fraction form
    620,999.20/931,498.80 = 284,419.90/x
  3. Step 3: Cross multiply
    620,999.20x = 931,498.80 × 284,419.90
  4. Step 4: Simplify right side
    620,999.20x = 264,936,795,546.12
  5. Step 5: Solve for x
    x = 264,936,795,546.12/620,999.20
  6. Step 6: Final answer
    x = 426,629.85

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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.