Home / 427,292.82-640,890.27-111,780.18

Finding the Fourth Proportional to 427,292.82, 640,890.27 and 111,780.18

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Solution

The fourth proportional to 427,292.82, 640,890.27 and 111,780.18 is: 167,657.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,292.82 : 640,890.27 = 111,780.18 : x
  2. Step 2: Convert to fraction form
    427,292.82/640,890.27 = 111,780.18/x
  3. Step 3: Cross multiply
    427,292.82x = 640,890.27 × 111,780.18
  4. Step 4: Simplify right side
    427,292.82x = 71,638,829,740.85
  5. Step 5: Solve for x
    x = 71,638,829,740.85/427,292.82
  6. Step 6: Final answer
    x = 167,657.46

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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.