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Finding the Fourth Proportional to 388,930.56, 583,414.31 and 189,012.79

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Solution

The fourth proportional to 388,930.56, 583,414.31 and 189,012.79 is: 283,528.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,930.56 : 583,414.31 = 189,012.79 : x
  2. Step 2: Convert to fraction form
    388,930.56/583,414.31 = 189,012.79/x
  3. Step 3: Cross multiply
    388,930.56x = 583,414.31 × 189,012.79
  4. Step 4: Simplify right side
    388,930.56x = 110,272,763,541.95
  5. Step 5: Solve for x
    x = 110,272,763,541.95/388,930.56
  6. Step 6: Final answer
    x = 283,528.16

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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.