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Finding the Fourth Proportional to 815,903.40, 1,223,855.10 and 798,407.40

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Solution

The fourth proportional to 815,903.40, 1,223,855.10 and 798,407.40 is: 1,197,611.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,903.40 : 1,223,855.10 = 798,407.40 : x
  2. Step 2: Convert to fraction form
    815,903.40/1,223,855.10 = 798,407.40/x
  3. Step 3: Cross multiply
    815,903.40x = 1,223,855.10 × 798,407.40
  4. Step 4: Simplify right side
    815,903.40x = 977,134,968,367.74
  5. Step 5: Solve for x
    x = 977,134,968,367.74/815,903.40
  6. Step 6: Final answer
    x = 1,197,611.10

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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.