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Finding the Fourth Proportional to 388,920.80, 582,725.10 and 188,810.30

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Solution

The fourth proportional to 388,920.80, 582,725.10 and 188,810.30 is: 282,896.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,920.80 : 582,725.10 = 188,810.30 : x
  2. Step 2: Convert to fraction form
    388,920.80/582,725.10 = 188,810.30/x
  3. Step 3: Cross multiply
    388,920.80x = 582,725.10 × 188,810.30
  4. Step 4: Simplify right side
    388,920.80x = 110,024,500,948.53
  5. Step 5: Solve for x
    x = 110,024,500,948.53/388,920.80
  6. Step 6: Final answer
    x = 282,896.93

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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.