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Finding the Fourth Proportional to 485,813.68, 728,742.40 and 148,829.84

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Solution

The fourth proportional to 485,813.68, 728,742.40 and 148,829.84 is: 223,251.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,813.68 : 728,742.40 = 148,829.84 : x
  2. Step 2: Convert to fraction form
    485,813.68/728,742.40 = 148,829.84/x
  3. Step 3: Cross multiply
    485,813.68x = 728,742.40 × 148,829.84
  4. Step 4: Simplify right side
    485,813.68x = 108,458,614,793.22
  5. Step 5: Solve for x
    x = 108,458,614,793.22/485,813.68
  6. Step 6: Final answer
    x = 223,251.46

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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.