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Finding the Fourth Proportional to 620,747.40, 931,772.64 and 550,121.88

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Solution

The fourth proportional to 620,747.40, 931,772.64 and 550,121.88 is: 825,760.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,747.40 : 931,772.64 = 550,121.88 : x
  2. Step 2: Convert to fraction form
    620,747.40/931,772.64 = 550,121.88/x
  3. Step 3: Cross multiply
    620,747.40x = 931,772.64 × 550,121.88
  4. Step 4: Simplify right side
    620,747.40x = 512,588,516,449.36
  5. Step 5: Solve for x
    x = 512,588,516,449.36/620,747.40
  6. Step 6: Final answer
    x = 825,760.23

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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.