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Finding the Fourth Proportional to 281,481.89, 388,445.15 and 154,157.45

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Solution

The fourth proportional to 281,481.89, 388,445.15 and 154,157.45 is: 212,737.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,481.89 : 388,445.15 = 154,157.45 : x
  2. Step 2: Convert to fraction form
    281,481.89/388,445.15 = 154,157.45/x
  3. Step 3: Cross multiply
    281,481.89x = 388,445.15 × 154,157.45
  4. Step 4: Simplify right side
    281,481.89x = 59,881,712,232.04
  5. Step 5: Solve for x
    x = 59,881,712,232.04/281,481.89
  6. Step 6: Final answer
    x = 212,737.36

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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.