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Finding the Fourth Proportional to 427,276.90, 640,514.40 and 161,216.20

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Solution

The fourth proportional to 427,276.90, 640,514.40 and 161,216.20 is: 241,673.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,276.90 : 640,514.40 = 161,216.20 : x
  2. Step 2: Convert to fraction form
    427,276.90/640,514.40 = 161,216.20/x
  3. Step 3: Cross multiply
    427,276.90x = 640,514.40 × 161,216.20
  4. Step 4: Simplify right side
    427,276.90x = 103,261,297,613.28
  5. Step 5: Solve for x
    x = 103,261,297,613.28/427,276.90
  6. Step 6: Final answer
    x = 241,673.02

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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.