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Finding the Fourth Proportional to 303,787.20, 455,024.70 and 264,421.20

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Solution

The fourth proportional to 303,787.20, 455,024.70 and 264,421.20 is: 396,060.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,787.20 : 455,024.70 = 264,421.20 : x
  2. Step 2: Convert to fraction form
    303,787.20/455,024.70 = 264,421.20/x
  3. Step 3: Cross multiply
    303,787.20x = 455,024.70 × 264,421.20
  4. Step 4: Simplify right side
    303,787.20x = 120,318,177,203.64
  5. Step 5: Solve for x
    x = 120,318,177,203.64/303,787.20
  6. Step 6: Final answer
    x = 396,060.72

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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.