Home / 281,253.47-388,127.50-153,928.76

Finding the Fourth Proportional to 281,253.47, 388,127.50 and 153,928.76

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Solution

The fourth proportional to 281,253.47, 388,127.50 and 153,928.76 is: 212,420.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,253.47 : 388,127.50 = 153,928.76 : x
  2. Step 2: Convert to fraction form
    281,253.47/388,127.50 = 153,928.76/x
  3. Step 3: Cross multiply
    281,253.47x = 388,127.50 × 153,928.76
  4. Step 4: Simplify right side
    281,253.47x = 59,743,982,471.44
  5. Step 5: Solve for x
    x = 59,743,982,471.44/281,253.47
  6. Step 6: Final answer
    x = 212,420.43

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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.