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Finding the Fourth Proportional to 426,604.63, 640,012.19 and 127,084.04

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Solution

The fourth proportional to 426,604.63, 640,012.19 and 127,084.04 is: 190,657.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,604.63 : 640,012.19 = 127,084.04 : x
  2. Step 2: Convert to fraction form
    426,604.63/640,012.19 = 127,084.04/x
  3. Step 3: Cross multiply
    426,604.63x = 640,012.19 × 127,084.04
  4. Step 4: Simplify right side
    426,604.63x = 81,335,334,595.59
  5. Step 5: Solve for x
    x = 81,335,334,595.59/426,604.63
  6. Step 6: Final answer
    x = 190,657.41

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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.