Home / 259,905.60-389,915.10-147,639.60

Finding the Fourth Proportional to 259,905.60, 389,915.10 and 147,639.60

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Solution

The fourth proportional to 259,905.60, 389,915.10 and 147,639.60 is: 221,491.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,905.60 : 389,915.10 = 147,639.60 : x
  2. Step 2: Convert to fraction form
    259,905.60/389,915.10 = 147,639.60/x
  3. Step 3: Cross multiply
    259,905.60x = 389,915.10 × 147,639.60
  4. Step 4: Simplify right side
    259,905.60x = 57,566,909,397.96
  5. Step 5: Solve for x
    x = 57,566,909,397.96/259,905.60
  6. Step 6: Final answer
    x = 221,491.61

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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.