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Finding the Fourth Proportional to 281,653.88, 388,691.46 and 154,337.67

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Solution

The fourth proportional to 281,653.88, 388,691.46 and 154,337.67 is: 212,990.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,653.88 : 388,691.46 = 154,337.67 : x
  2. Step 2: Convert to fraction form
    281,653.88/388,691.46 = 154,337.67/x
  3. Step 3: Cross multiply
    281,653.88x = 388,691.46 × 154,337.67
  4. Step 4: Simplify right side
    281,653.88x = 59,989,734,285.30
  5. Step 5: Solve for x
    x = 59,989,734,285.30/281,653.88
  6. Step 6: Final answer
    x = 212,990.98

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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.