Home / 427,240.18-640,988.73-127,730.50

Finding the Fourth Proportional to 427,240.18, 640,988.73 and 127,730.50

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Solution

The fourth proportional to 427,240.18, 640,988.73 and 127,730.50 is: 191,634.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,240.18 : 640,988.73 = 127,730.50 : x
  2. Step 2: Convert to fraction form
    427,240.18/640,988.73 = 127,730.50/x
  3. Step 3: Cross multiply
    427,240.18x = 640,988.73 × 127,730.50
  4. Step 4: Simplify right side
    427,240.18x = 81,873,810,977.27
  5. Step 5: Solve for x
    x = 81,873,810,977.27/427,240.18
  6. Step 6: Final answer
    x = 191,634.16

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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.