Home / 430,134.20-645,332.52-219,919.76

Finding the Fourth Proportional to 430,134.20, 645,332.52 and 219,919.76

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Solution

The fourth proportional to 430,134.20, 645,332.52 and 219,919.76 is: 329,946.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,134.20 : 645,332.52 = 219,919.76 : x
  2. Step 2: Convert to fraction form
    430,134.20/645,332.52 = 219,919.76/x
  3. Step 3: Cross multiply
    430,134.20x = 645,332.52 × 219,919.76
  4. Step 4: Simplify right side
    430,134.20x = 141,921,372,918.60
  5. Step 5: Solve for x
    x = 141,921,372,918.60/430,134.20
  6. Step 6: Final answer
    x = 329,946.73

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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.