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Finding the Fourth Proportional to 428,603.92, 642,542.84 and 262,042

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Solution

The fourth proportional to 428,603.92, 642,542.84 and 262,042 is: 392,841.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,603.92 : 642,542.84 = 262,042 : x
  2. Step 2: Convert to fraction form
    428,603.92/642,542.84 = 262,042/x
  3. Step 3: Cross multiply
    428,603.92x = 642,542.84 × 262,042
  4. Step 4: Simplify right side
    428,603.92x = 168,373,210,879.28
  5. Step 5: Solve for x
    x = 168,373,210,879.28/428,603.92
  6. Step 6: Final answer
    x = 392,841.04

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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.