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Finding the Fourth Proportional to 388,690.40, 583,035.60 and 222,361.76

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Solution

The fourth proportional to 388,690.40, 583,035.60 and 222,361.76 is: 333,542.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,690.40 : 583,035.60 = 222,361.76 : x
  2. Step 2: Convert to fraction form
    388,690.40/583,035.60 = 222,361.76/x
  3. Step 3: Cross multiply
    388,690.40x = 583,035.60 × 222,361.76
  4. Step 4: Simplify right side
    388,690.40x = 129,644,822,158.66
  5. Step 5: Solve for x
    x = 129,644,822,158.66/388,690.40
  6. Step 6: Final answer
    x = 333,542.64

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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.