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Finding the Fourth Proportional to 281,391.84, 388,330.50 and 154,068.30

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Solution

The fourth proportional to 281,391.84, 388,330.50 and 154,068.30 is: 212,619.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,391.84 : 388,330.50 = 154,068.30 : x
  2. Step 2: Convert to fraction form
    281,391.84/388,330.50 = 154,068.30/x
  3. Step 3: Cross multiply
    281,391.84x = 388,330.50 × 154,068.30
  4. Step 4: Simplify right side
    281,391.84x = 59,829,419,973.15
  5. Step 5: Solve for x
    x = 59,829,419,973.15/281,391.84
  6. Step 6: Final answer
    x = 212,619.60

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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.