Home / 430,240.60-645,360.50-130,719.96

Finding the Fourth Proportional to 430,240.60, 645,360.50 and 130,719.96

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Solution

The fourth proportional to 430,240.60, 645,360.50 and 130,719.96 is: 196,079.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,240.60 : 645,360.50 = 130,719.96 : x
  2. Step 2: Convert to fraction form
    430,240.60/645,360.50 = 130,719.96/x
  3. Step 3: Cross multiply
    430,240.60x = 645,360.50 × 130,719.96
  4. Step 4: Simplify right side
    430,240.60x = 84,361,498,745.58
  5. Step 5: Solve for x
    x = 84,361,498,745.58/430,240.60
  6. Step 6: Final answer
    x = 196,079.82

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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.