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Finding the Fourth Proportional to 281,321.64, 388,228.14 and 154,009.08

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Solution

The fourth proportional to 281,321.64, 388,228.14 and 154,009.08 is: 212,534.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,321.64 : 388,228.14 = 154,009.08 : x
  2. Step 2: Convert to fraction form
    281,321.64/388,228.14 = 154,009.08/x
  3. Step 3: Cross multiply
    281,321.64x = 388,228.14 × 154,009.08
  4. Step 4: Simplify right side
    281,321.64x = 59,790,658,671.51
  5. Step 5: Solve for x
    x = 59,790,658,671.51/281,321.64
  6. Step 6: Final answer
    x = 212,534.87

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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.