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Finding the Fourth Proportional to 308,215.28, 462,304.46 and 128,255.25

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Solution

The fourth proportional to 308,215.28, 462,304.46 and 128,255.25 is: 192,375.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,215.28 : 462,304.46 = 128,255.25 : x
  2. Step 2: Convert to fraction form
    308,215.28/462,304.46 = 128,255.25/x
  3. Step 3: Cross multiply
    308,215.28x = 462,304.46 × 128,255.25
  4. Step 4: Simplify right side
    308,215.28x = 59,292,973,547.23
  5. Step 5: Solve for x
    x = 59,292,973,547.23/308,215.28
  6. Step 6: Final answer
    x = 192,375.19

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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.