Home / 427,239.18-640,987.23-127,729.50

Finding the Fourth Proportional to 427,239.18, 640,987.23 and 127,729.50

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Solution

The fourth proportional to 427,239.18, 640,987.23 and 127,729.50 is: 191,632.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,239.18 : 640,987.23 = 127,729.50 : x
  2. Step 2: Convert to fraction form
    427,239.18/640,987.23 = 127,729.50/x
  3. Step 3: Cross multiply
    427,239.18x = 640,987.23 × 127,729.50
  4. Step 4: Simplify right side
    427,239.18x = 81,872,978,394.29
  5. Step 5: Solve for x
    x = 81,872,978,394.29/427,239.18
  6. Step 6: Final answer
    x = 191,632.66

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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.