Home / 281,480.20-388,428.28-154,131.20

Finding the Fourth Proportional to 281,480.20, 388,428.28 and 154,131.20

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Solution

The fourth proportional to 281,480.20, 388,428.28 and 154,131.20 is: 212,693.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,480.20 : 388,428.28 = 154,131.20 : x
  2. Step 2: Convert to fraction form
    281,480.20/388,428.28 = 154,131.20/x
  3. Step 3: Cross multiply
    281,480.20x = 388,428.28 × 154,131.20
  4. Step 4: Simplify right side
    281,480.20x = 59,868,916,910.34
  5. Step 5: Solve for x
    x = 59,868,916,910.34/281,480.20
  6. Step 6: Final answer
    x = 212,693.17

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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.