Home / 430,945.86-646,418.78-220,468.98

Finding the Fourth Proportional to 430,945.86, 646,418.78 and 220,468.98

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Solution

The fourth proportional to 430,945.86, 646,418.78 and 220,468.98 is: 330,703.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,945.86 : 646,418.78 = 220,468.98 : x
  2. Step 2: Convert to fraction form
    430,945.86/646,418.78 = 220,468.98/x
  3. Step 3: Cross multiply
    430,945.86x = 646,418.78 × 220,468.98
  4. Step 4: Simplify right side
    430,945.86x = 142,515,289,079.44
  5. Step 5: Solve for x
    x = 142,515,289,079.44/430,945.86
  6. Step 6: Final answer
    x = 330,703.46

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Double scale
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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.