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Finding the Fourth Proportional to 485,799.70, 728,721.42 and 148,815.80

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Solution

The fourth proportional to 485,799.70, 728,721.42 and 148,815.80 is: 223,230.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,799.70 : 728,721.42 = 148,815.80 : x
  2. Step 2: Convert to fraction form
    485,799.70/728,721.42 = 148,815.80/x
  3. Step 3: Cross multiply
    485,799.70x = 728,721.42 × 148,815.80
  4. Step 4: Simplify right side
    485,799.70x = 108,445,261,094.44
  5. Step 5: Solve for x
    x = 108,445,261,094.44/485,799.70
  6. Step 6: Final answer
    x = 223,230.40

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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.