Home / 430,130.20-645,326.52-219,915.76

Finding the Fourth Proportional to 430,130.20, 645,326.52 and 219,915.76

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Solution

The fourth proportional to 430,130.20, 645,326.52 and 219,915.76 is: 329,940.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,130.20 : 645,326.52 = 219,915.76 : x
  2. Step 2: Convert to fraction form
    430,130.20/645,326.52 = 219,915.76/x
  3. Step 3: Cross multiply
    430,130.20x = 645,326.52 × 219,915.76
  4. Step 4: Simplify right side
    430,130.20x = 141,917,472,093.96
  5. Step 5: Solve for x
    x = 141,917,472,093.96/430,130.20
  6. Step 6: Final answer
    x = 329,940.73

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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.