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Finding the Fourth Proportional to 426,697.30, 640,043.64 and 173,976.81

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Solution

The fourth proportional to 426,697.30, 640,043.64 and 173,976.81 is: 260,964.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,697.30 : 640,043.64 = 173,976.81 : x
  2. Step 2: Convert to fraction form
    426,697.30/640,043.64 = 173,976.81/x
  3. Step 3: Cross multiply
    426,697.30x = 640,043.64 × 173,976.81
  4. Step 4: Simplify right side
    426,697.30x = 111,352,748,347.83
  5. Step 5: Solve for x
    x = 111,352,748,347.83/426,697.30
  6. Step 6: Final answer
    x = 260,964.27

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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.