Home / 427,286.80-640,943.28-146,800

Finding the Fourth Proportional to 427,286.80, 640,943.28 and 146,800

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Solution

The fourth proportional to 427,286.80, 640,943.28 and 146,800 is: 220,204.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,286.80 : 640,943.28 = 146,800 : x
  2. Step 2: Convert to fraction form
    427,286.80/640,943.28 = 146,800/x
  3. Step 3: Cross multiply
    427,286.80x = 640,943.28 × 146,800
  4. Step 4: Simplify right side
    427,286.80x = 94,090,473,504
  5. Step 5: Solve for x
    x = 94,090,473,504/427,286.80
  6. Step 6: Final answer
    x = 220,204.49

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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.