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Finding the Fourth Proportional to 387,622.40, 580,121.40 and 340,383.20

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Solution

The fourth proportional to 387,622.40, 580,121.40 and 340,383.20 is: 509,422.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,622.40 : 580,121.40 = 340,383.20 : x
  2. Step 2: Convert to fraction form
    387,622.40/580,121.40 = 340,383.20/x
  3. Step 3: Cross multiply
    387,622.40x = 580,121.40 × 340,383.20
  4. Step 4: Simplify right side
    387,622.40x = 197,463,578,520.48
  5. Step 5: Solve for x
    x = 197,463,578,520.48/387,622.40
  6. Step 6: Final answer
    x = 509,422.52

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.