Home / 781,528.62-1,172,128.89-220,431.90

Finding the Fourth Proportional to 781,528.62, 1,172,128.89 and 220,431.90

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Solution

The fourth proportional to 781,528.62, 1,172,128.89 and 220,431.90 is: 330,601.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    781,528.62 : 1,172,128.89 = 220,431.90 : x
  2. Step 2: Convert to fraction form
    781,528.62/1,172,128.89 = 220,431.90/x
  3. Step 3: Cross multiply
    781,528.62x = 1,172,128.89 × 220,431.90
  4. Step 4: Simplify right side
    781,528.62x = 258,374,598,267.59
  5. Step 5: Solve for x
    x = 258,374,598,267.59/781,528.62
  6. Step 6: Final answer
    x = 330,601.58

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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.