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Finding the Fourth Proportional to 386,490.87, 533,558.21 and 300,257.46

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Solution

The fourth proportional to 386,490.87, 533,558.21 and 300,257.46 is: 414,511.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,490.87 : 533,558.21 = 300,257.46 : x
  2. Step 2: Convert to fraction form
    386,490.87/533,558.21 = 300,257.46/x
  3. Step 3: Cross multiply
    386,490.87x = 533,558.21 × 300,257.46
  4. Step 4: Simplify right side
    386,490.87x = 160,204,831,395.46
  5. Step 5: Solve for x
    x = 160,204,831,395.46/386,490.87
  6. Step 6: Final answer
    x = 414,511.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.