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Finding the Fourth Proportional to 426,804.67, 640,295.39 and 174,085.89

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Solution

The fourth proportional to 426,804.67, 640,295.39 and 174,085.89 is: 261,164.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,804.67 : 640,295.39 = 174,085.89 : x
  2. Step 2: Convert to fraction form
    426,804.67/640,295.39 = 174,085.89/x
  3. Step 3: Cross multiply
    426,804.67x = 640,295.39 × 174,085.89
  4. Step 4: Simplify right side
    426,804.67x = 111,466,392,831.05
  5. Step 5: Solve for x
    x = 111,466,392,831.05/426,804.67
  6. Step 6: Final answer
    x = 261,164.89

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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.