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Finding the Fourth Proportional to 426,697.80, 640,044.39 and 173,977.31

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Solution

The fourth proportional to 426,697.80, 640,044.39 and 173,977.31 is: 260,965.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,697.80 : 640,044.39 = 173,977.31 : x
  2. Step 2: Convert to fraction form
    426,697.80/640,044.39 = 173,977.31/x
  3. Step 3: Cross multiply
    426,697.80x = 640,044.39 × 173,977.31
  4. Step 4: Simplify right side
    426,697.80x = 111,353,199,652.68
  5. Step 5: Solve for x
    x = 111,353,199,652.68/426,697.80
  6. Step 6: Final answer
    x = 260,965.02

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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.