Home / 430,587.20-645,621.60-220,635.20

Finding the Fourth Proportional to 430,587.20, 645,621.60 and 220,635.20

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Solution

The fourth proportional to 430,587.20, 645,621.60 and 220,635.20 is: 330,819.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,587.20 : 645,621.60 = 220,635.20 : x
  2. Step 2: Convert to fraction form
    430,587.20/645,621.60 = 220,635.20/x
  3. Step 3: Cross multiply
    430,587.20x = 645,621.60 × 220,635.20
  4. Step 4: Simplify right side
    430,587.20x = 142,446,850,840.32
  5. Step 5: Solve for x
    x = 142,446,850,840.32/430,587.20
  6. Step 6: Final answer
    x = 330,819.98

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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.