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Finding the Fourth Proportional to 485,799.06, 728,720.46 and 148,815.12

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Solution

The fourth proportional to 485,799.06, 728,720.46 and 148,815.12 is: 223,229.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,799.06 : 728,720.46 = 148,815.12 : x
  2. Step 2: Convert to fraction form
    485,799.06/728,720.46 = 148,815.12/x
  3. Step 3: Cross multiply
    485,799.06x = 728,720.46 × 148,815.12
  4. Step 4: Simplify right side
    485,799.06x = 108,444,622,701.36
  5. Step 5: Solve for x
    x = 108,444,622,701.36/485,799.06
  6. Step 6: Final answer
    x = 223,229.38

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1.5x scale

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.