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Finding the Fourth Proportional to 426,759.66, 640,172.16 and 127,217.34

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Solution

The fourth proportional to 426,759.66, 640,172.16 and 127,217.34 is: 190,835.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,759.66 : 640,172.16 = 127,217.34 : x
  2. Step 2: Convert to fraction form
    426,759.66/640,172.16 = 127,217.34/x
  3. Step 3: Cross multiply
    426,759.66x = 640,172.16 × 127,217.34
  4. Step 4: Simplify right side
    426,759.66x = 81,440,999,337.25
  5. Step 5: Solve for x
    x = 81,440,999,337.25/426,759.66
  6. Step 6: Final answer
    x = 190,835.75

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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.