Home / 428,049.20-641,922.60-147,501.20

Finding the Fourth Proportional to 428,049.20, 641,922.60 and 147,501.20

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Solution

The fourth proportional to 428,049.20, 641,922.60 and 147,501.20 is: 221,199.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,049.20 : 641,922.60 = 147,501.20 : x
  2. Step 2: Convert to fraction form
    428,049.20/641,922.60 = 147,501.20/x
  3. Step 3: Cross multiply
    428,049.20x = 641,922.60 × 147,501.20
  4. Step 4: Simplify right side
    428,049.20x = 94,684,353,807.12
  5. Step 5: Solve for x
    x = 94,684,353,807.12/428,049.20
  6. Step 6: Final answer
    x = 221,199.70

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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.