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Finding the Fourth Proportional to 323,814.20, 485,721.30 and 284,448.20

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Solution

The fourth proportional to 323,814.20, 485,721.30 and 284,448.20 is: 426,672.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,814.20 : 485,721.30 = 284,448.20 : x
  2. Step 2: Convert to fraction form
    323,814.20/485,721.30 = 284,448.20/x
  3. Step 3: Cross multiply
    323,814.20x = 485,721.30 × 284,448.20
  4. Step 4: Simplify right side
    323,814.20x = 138,162,549,486.66
  5. Step 5: Solve for x
    x = 138,162,549,486.66/323,814.20
  6. Step 6: Final answer
    x = 426,672.30

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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.