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Finding the Fourth Proportional to 485,783.80, 728,330.10 and 186,148.60

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Solution

The fourth proportional to 485,783.80, 728,330.10 and 186,148.60 is: 279,090.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,783.80 : 728,330.10 = 186,148.60 : x
  2. Step 2: Convert to fraction form
    485,783.80/728,330.10 = 186,148.60/x
  3. Step 3: Cross multiply
    485,783.80x = 728,330.10 × 186,148.60
  4. Step 4: Simplify right side
    485,783.80x = 135,577,628,452.86
  5. Step 5: Solve for x
    x = 135,577,628,452.86/485,783.80
  6. Step 6: Final answer
    x = 279,090.47

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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.