Home / 743,138.40-1,115,053.20-388,552.80

Finding the Fourth Proportional to 743,138.40, 1,115,053.20 and 388,552.80

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Solution

The fourth proportional to 743,138.40, 1,115,053.20 and 388,552.80 is: 583,009.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    743,138.40 : 1,115,053.20 = 388,552.80 : x
  2. Step 2: Convert to fraction form
    743,138.40/1,115,053.20 = 388,552.80/x
  3. Step 3: Cross multiply
    743,138.40x = 1,115,053.20 × 388,552.80
  4. Step 4: Simplify right side
    743,138.40x = 433,257,043,008.96
  5. Step 5: Solve for x
    x = 433,257,043,008.96/743,138.40
  6. Step 6: Final answer
    x = 583,009.90

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.