Home / 430,582.20-645,614.10-220,630.20

Finding the Fourth Proportional to 430,582.20, 645,614.10 and 220,630.20

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Solution

The fourth proportional to 430,582.20, 645,614.10 and 220,630.20 is: 330,812.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,582.20 : 645,614.10 = 220,630.20 : x
  2. Step 2: Convert to fraction form
    430,582.20/645,614.10 = 220,630.20/x
  3. Step 3: Cross multiply
    430,582.20x = 645,614.10 × 220,630.20
  4. Step 4: Simplify right side
    430,582.20x = 142,441,968,005.82
  5. Step 5: Solve for x
    x = 142,441,968,005.82/430,582.20
  6. Step 6: Final answer
    x = 330,812.49

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Similar ratio
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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.