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Finding the Fourth Proportional to 281,255.59, 388,130.43 and 153,930.88

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Solution

The fourth proportional to 281,255.59, 388,130.43 and 153,930.88 is: 212,423.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,255.59 : 388,130.43 = 153,930.88 : x
  2. Step 2: Convert to fraction form
    281,255.59/388,130.43 = 153,930.88/x
  3. Step 3: Cross multiply
    281,255.59x = 388,130.43 × 153,930.88
  4. Step 4: Simplify right side
    281,255.59x = 59,745,258,644.68
  5. Step 5: Solve for x
    x = 59,745,258,644.68/281,255.59
  6. Step 6: Final answer
    x = 212,423.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.