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Finding the Fourth Proportional to 281,996.64, 389,158.56 and 154,686.24

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Solution

The fourth proportional to 281,996.64, 389,158.56 and 154,686.24 is: 213,468.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,996.64 : 389,158.56 = 154,686.24 : x
  2. Step 2: Convert to fraction form
    281,996.64/389,158.56 = 154,686.24/x
  3. Step 3: Cross multiply
    281,996.64x = 389,158.56 × 154,686.24
  4. Step 4: Simplify right side
    281,996.64x = 60,197,474,410.21
  5. Step 5: Solve for x
    x = 60,197,474,410.21/281,996.64
  6. Step 6: Final answer
    x = 213,468.76

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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.