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Finding the Fourth Proportional to 485,756.75, 728,683.73 and 148,793.51

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Solution

The fourth proportional to 485,756.75, 728,683.73 and 148,793.51 is: 223,205.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,756.75 : 728,683.73 = 148,793.51 : x
  2. Step 2: Convert to fraction form
    485,756.75/728,683.73 = 148,793.51/x
  3. Step 3: Cross multiply
    485,756.75x = 728,683.73 × 148,793.51
  4. Step 4: Simplify right side
    485,756.75x = 108,423,409,866.59
  5. Step 5: Solve for x
    x = 108,423,409,866.59/485,756.75
  6. Step 6: Final answer
    x = 223,205.15

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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.