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Finding the Fourth Proportional to 362,440.30, 543,660.45 and 287,790.70

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Solution

The fourth proportional to 362,440.30, 543,660.45 and 287,790.70 is: 431,686.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    362,440.30 : 543,660.45 = 287,790.70 : x
  2. Step 2: Convert to fraction form
    362,440.30/543,660.45 = 287,790.70/x
  3. Step 3: Cross multiply
    362,440.30x = 543,660.45 × 287,790.70
  4. Step 4: Simplify right side
    362,440.30x = 156,460,421,467.82
  5. Step 5: Solve for x
    x = 156,460,421,467.82/362,440.30
  6. Step 6: Final answer
    x = 431,686.05

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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.