Home / 430,144.20-645,347.52-219,929.76

Finding the Fourth Proportional to 430,144.20, 645,347.52 and 219,929.76

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Solution

The fourth proportional to 430,144.20, 645,347.52 and 219,929.76 is: 329,961.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,144.20 : 645,347.52 = 219,929.76 : x
  2. Step 2: Convert to fraction form
    430,144.20/645,347.52 = 219,929.76/x
  3. Step 3: Cross multiply
    430,144.20x = 645,347.52 × 219,929.76
  4. Step 4: Simplify right side
    430,144.20x = 141,931,125,190.20
  5. Step 5: Solve for x
    x = 141,931,125,190.20/430,144.20
  6. Step 6: Final answer
    x = 329,961.73

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1.5x scale

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.