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Finding the Fourth Proportional to 415,613.80, 623,274.90 and 215,867.80

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Solution

The fourth proportional to 415,613.80, 623,274.90 and 215,867.80 is: 323,725.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,613.80 : 623,274.90 = 215,867.80 : x
  2. Step 2: Convert to fraction form
    415,613.80/623,274.90 = 215,867.80/x
  3. Step 3: Cross multiply
    415,613.80x = 623,274.90 × 215,867.80
  4. Step 4: Simplify right side
    415,613.80x = 134,544,981,458.22
  5. Step 5: Solve for x
    x = 134,544,981,458.22/415,613.80
  6. Step 6: Final answer
    x = 323,725.97

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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.