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Finding the Fourth Proportional to 826,613.80, 1,239,920.70 and 818,740.60

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Solution

The fourth proportional to 826,613.80, 1,239,920.70 and 818,740.60 is: 1,228,110.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    826,613.80 : 1,239,920.70 = 818,740.60 : x
  2. Step 2: Convert to fraction form
    826,613.80/1,239,920.70 = 818,740.60/x
  3. Step 3: Cross multiply
    826,613.80x = 1,239,920.70 × 818,740.60
  4. Step 4: Simplify right side
    826,613.80x = 1,015,173,417,870.42
  5. Step 5: Solve for x
    x = 1,015,173,417,870.42/826,613.80
  6. Step 6: Final answer
    x = 1,228,110.90

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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.