Home / 281,314.05-388,223.18-153,990.55

Finding the Fourth Proportional to 281,314.05, 388,223.18 and 153,990.55

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Solution

The fourth proportional to 281,314.05, 388,223.18 and 153,990.55 is: 212,512.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,314.05 : 388,223.18 = 153,990.55 : x
  2. Step 2: Convert to fraction form
    281,314.05/388,223.18 = 153,990.55/x
  3. Step 3: Cross multiply
    281,314.05x = 388,223.18 × 153,990.55
  4. Step 4: Simplify right side
    281,314.05x = 59,782,701,010.95
  5. Step 5: Solve for x
    x = 59,782,701,010.95/281,314.05
  6. Step 6: Final answer
    x = 212,512.32

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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.