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Finding the Fourth Proportional to 281,859.74, 388,966.55 and 154,532.70

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Solution

The fourth proportional to 281,859.74, 388,966.55 and 154,532.70 is: 213,255.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,859.74 : 388,966.55 = 154,532.70 : x
  2. Step 2: Convert to fraction form
    281,859.74/388,966.55 = 154,532.70/x
  3. Step 3: Cross multiply
    281,859.74x = 388,966.55 × 154,532.70
  4. Step 4: Simplify right side
    281,859.74x = 60,108,051,181.19
  5. Step 5: Solve for x
    x = 60,108,051,181.19/281,859.74
  6. Step 6: Final answer
    x = 213,255.19

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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.