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Finding the Fourth Proportional to 485,756.50, 728,683.36 and 148,793.26

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Solution

The fourth proportional to 485,756.50, 728,683.36 and 148,793.26 is: 223,204.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,756.50 : 728,683.36 = 148,793.26 : x
  2. Step 2: Convert to fraction form
    485,756.50/728,683.36 = 148,793.26/x
  3. Step 3: Cross multiply
    485,756.50x = 728,683.36 × 148,793.26
  4. Step 4: Simplify right side
    485,756.50x = 108,423,170,448.46
  5. Step 5: Solve for x
    x = 108,423,170,448.46/485,756.50
  6. Step 6: Final answer
    x = 223,204.78

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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.