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Finding the Fourth Proportional to 804,978.40, 1,207,613.40 and 404,611.60

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Solution

The fourth proportional to 804,978.40, 1,207,613.40 and 404,611.60 is: 606,990.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    804,978.40 : 1,207,613.40 = 404,611.60 : x
  2. Step 2: Convert to fraction form
    804,978.40/1,207,613.40 = 404,611.60/x
  3. Step 3: Cross multiply
    804,978.40x = 1,207,613.40 × 404,611.60
  4. Step 4: Simplify right side
    804,978.40x = 488,614,389,955.44
  5. Step 5: Solve for x
    x = 488,614,389,955.44/804,978.40
  6. Step 6: Final answer
    x = 606,990.68

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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.