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Finding the Fourth Proportional to 299,103.40, 448,655.10 and 215,122.60

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Solution

The fourth proportional to 299,103.40, 448,655.10 and 215,122.60 is: 322,683.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    299,103.40 : 448,655.10 = 215,122.60 : x
  2. Step 2: Convert to fraction form
    299,103.40/448,655.10 = 215,122.60/x
  3. Step 3: Cross multiply
    299,103.40x = 448,655.10 × 215,122.60
  4. Step 4: Simplify right side
    299,103.40x = 96,515,851,615.26
  5. Step 5: Solve for x
    x = 96,515,851,615.26/299,103.40
  6. Step 6: Final answer
    x = 322,683.90

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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.