Home / 427,270.80-640,969.96-157,378.38

Finding the Fourth Proportional to 427,270.80, 640,969.96 and 157,378.38

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Solution

The fourth proportional to 427,270.80, 640,969.96 and 157,378.38 is: 236,091.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,270.80 : 640,969.96 = 157,378.38 : x
  2. Step 2: Convert to fraction form
    427,270.80/640,969.96 = 157,378.38/x
  3. Step 3: Cross multiply
    427,270.80x = 640,969.96 × 157,378.38
  4. Step 4: Simplify right side
    427,270.80x = 100,874,813,933.47
  5. Step 5: Solve for x
    x = 100,874,813,933.47/427,270.80
  6. Step 6: Final answer
    x = 236,091.05

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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.