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Finding the Fourth Proportional to 427,028.16, 640,632.96 and 127,532.16

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Solution

The fourth proportional to 427,028.16, 640,632.96 and 127,532.16 is: 191,325.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,028.16 : 640,632.96 = 127,532.16 : x
  2. Step 2: Convert to fraction form
    427,028.16/640,632.96 = 127,532.16/x
  3. Step 3: Cross multiply
    427,028.16x = 640,632.96 × 127,532.16
  4. Step 4: Simplify right side
    427,028.16x = 81,701,305,155.99
  5. Step 5: Solve for x
    x = 81,701,305,155.99/427,028.16
  6. Step 6: Final answer
    x = 191,325.33

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1.5x scale

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.