Home / 281,478.11-388,439.94-154,153.70

Finding the Fourth Proportional to 281,478.11, 388,439.94 and 154,153.70

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Solution

The fourth proportional to 281,478.11, 388,439.94 and 154,153.70 is: 212,732.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,478.11 : 388,439.94 = 154,153.70 : x
  2. Step 2: Convert to fraction form
    281,478.11/388,439.94 = 154,153.70/x
  3. Step 3: Cross multiply
    281,478.11x = 388,439.94 × 154,153.70
  4. Step 4: Simplify right side
    281,478.11x = 59,879,452,036.58
  5. Step 5: Solve for x
    x = 59,879,452,036.58/281,478.11
  6. Step 6: Final answer
    x = 212,732.18

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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.