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Finding the Fourth Proportional to 281,754.90, 388,819.44 and 154,430.19

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Solution

The fourth proportional to 281,754.90, 388,819.44 and 154,430.19 is: 213,112.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,754.90 : 388,819.44 = 154,430.19 : x
  2. Step 2: Convert to fraction form
    281,754.90/388,819.44 = 154,430.19/x
  3. Step 3: Cross multiply
    281,754.90x = 388,819.44 × 154,430.19
  4. Step 4: Simplify right side
    281,754.90x = 60,045,459,994.89
  5. Step 5: Solve for x
    x = 60,045,459,994.89/281,754.90
  6. Step 6: Final answer
    x = 213,112.39

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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.