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Finding the Fourth Proportional to 378,646.42, 522,514.47 and 217,387.96

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Solution

The fourth proportional to 378,646.42, 522,514.47 and 217,387.96 is: 299,985.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,646.42 : 522,514.47 = 217,387.96 : x
  2. Step 2: Convert to fraction form
    378,646.42/522,514.47 = 217,387.96/x
  3. Step 3: Cross multiply
    378,646.42x = 522,514.47 × 217,387.96
  4. Step 4: Simplify right side
    378,646.42x = 113,588,354,703.78
  5. Step 5: Solve for x
    x = 113,588,354,703.78/378,646.42
  6. Step 6: Final answer
    x = 299,985.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.