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Finding the Fourth Proportional to 426,598.11, 640,013.85 and 186,668.37

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Solution

The fourth proportional to 426,598.11, 640,013.85 and 186,668.37 is: 280,053.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,598.11 : 640,013.85 = 186,668.37 : x
  2. Step 2: Convert to fraction form
    426,598.11/640,013.85 = 186,668.37/x
  3. Step 3: Cross multiply
    426,598.11x = 640,013.85 × 186,668.37
  4. Step 4: Simplify right side
    426,598.11x = 119,470,342,156.93
  5. Step 5: Solve for x
    x = 119,470,342,156.93/426,598.11
  6. Step 6: Final answer
    x = 280,053.61

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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.