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Finding the Fourth Proportional to 620,735.20, 931,016.40 and 200,053.60

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Solution

The fourth proportional to 620,735.20, 931,016.40 and 200,053.60 is: 300,052.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,735.20 : 931,016.40 = 200,053.60 : x
  2. Step 2: Convert to fraction form
    620,735.20/931,016.40 = 200,053.60/x
  3. Step 3: Cross multiply
    620,735.20x = 931,016.40 × 200,053.60
  4. Step 4: Simplify right side
    620,735.20x = 186,253,182,479.04
  5. Step 5: Solve for x
    x = 186,253,182,479.04/620,735.20
  6. Step 6: Final answer
    x = 300,052.55

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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.