Home / 428,223.20-642,183.60-147,675.20

Finding the Fourth Proportional to 428,223.20, 642,183.60 and 147,675.20

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Solution

The fourth proportional to 428,223.20, 642,183.60 and 147,675.20 is: 221,460.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,223.20 : 642,183.60 = 147,675.20 : x
  2. Step 2: Convert to fraction form
    428,223.20/642,183.60 = 147,675.20/x
  3. Step 3: Cross multiply
    428,223.20x = 642,183.60 × 147,675.20
  4. Step 4: Simplify right side
    428,223.20x = 94,834,591,566.72
  5. Step 5: Solve for x
    x = 94,834,591,566.72/428,223.20
  6. Step 6: Final answer
    x = 221,460.66

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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.