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Finding the Fourth Proportional to 40,646.40, 60,969.60 and 28,204.80

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Solution

The fourth proportional to 40,646.40, 60,969.60 and 28,204.80 is: 42,307.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,646.40 : 60,969.60 = 28,204.80 : x
  2. Step 2: Convert to fraction form
    40,646.40/60,969.60 = 28,204.80/x
  3. Step 3: Cross multiply
    40,646.40x = 60,969.60 × 28,204.80
  4. Step 4: Simplify right side
    40,646.40x = 1,719,635,374.08
  5. Step 5: Solve for x
    x = 1,719,635,374.08/40,646.40
  6. Step 6: Final answer
    x = 42,307.20

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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.