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Finding the Fourth Proportional to 388,570.45, 582,012.01 and 188,470.28

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Solution

The fourth proportional to 388,570.45, 582,012.01 and 188,470.28 is: 282,296.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,570.45 : 582,012.01 = 188,470.28 : x
  2. Step 2: Convert to fraction form
    388,570.45/582,012.01 = 188,470.28/x
  3. Step 3: Cross multiply
    388,570.45x = 582,012.01 × 188,470.28
  4. Step 4: Simplify right side
    388,570.45x = 109,691,966,488.06
  5. Step 5: Solve for x
    x = 109,691,966,488.06/388,570.45
  6. Step 6: Final answer
    x = 282,296.21

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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.