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Finding the Fourth Proportional to 426,267.88, 639,400.74 and 400,285.24

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Solution

The fourth proportional to 426,267.88, 639,400.74 and 400,285.24 is: 600,426.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,267.88 : 639,400.74 = 400,285.24 : x
  2. Step 2: Convert to fraction form
    426,267.88/639,400.74 = 400,285.24/x
  3. Step 3: Cross multiply
    426,267.88x = 639,400.74 × 400,285.24
  4. Step 4: Simplify right side
    426,267.88x = 255,942,678,667.08
  5. Step 5: Solve for x
    x = 255,942,678,667.08/426,267.88
  6. Step 6: Final answer
    x = 600,426.85

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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.