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Finding the Fourth Proportional to 260,322.66, 390,038.22 and 142,076.97

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Solution

The fourth proportional to 260,322.66, 390,038.22 and 142,076.97 is: 212,872.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,322.66 : 390,038.22 = 142,076.97 : x
  2. Step 2: Convert to fraction form
    260,322.66/390,038.22 = 142,076.97/x
  3. Step 3: Cross multiply
    260,322.66x = 390,038.22 × 142,076.97
  4. Step 4: Simplify right side
    260,322.66x = 55,415,448,481.79
  5. Step 5: Solve for x
    x = 55,415,448,481.79/260,322.66
  6. Step 6: Final answer
    x = 212,872.17

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.