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Finding the Fourth Proportional to 603,123.20, 903,372.60 and 485,025.20

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Solution

The fourth proportional to 603,123.20, 903,372.60 and 485,025.20 is: 726,482.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    603,123.20 : 903,372.60 = 485,025.20 : x
  2. Step 2: Convert to fraction form
    603,123.20/903,372.60 = 485,025.20/x
  3. Step 3: Cross multiply
    603,123.20x = 903,372.60 × 485,025.20
  4. Step 4: Simplify right side
    603,123.20x = 438,158,475,989.52
  5. Step 5: Solve for x
    x = 438,158,475,989.52/603,123.20
  6. Step 6: Final answer
    x = 726,482.54

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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.