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Finding the Fourth Proportional to 479,203.48, 661,513.30 and 309,520.36

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Solution

The fourth proportional to 479,203.48, 661,513.30 and 309,520.36 is: 427,275.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,203.48 : 661,513.30 = 309,520.36 : x
  2. Step 2: Convert to fraction form
    479,203.48/661,513.30 = 309,520.36/x
  3. Step 3: Cross multiply
    479,203.48x = 661,513.30 × 309,520.36
  4. Step 4: Simplify right side
    479,203.48x = 204,751,834,760.79
  5. Step 5: Solve for x
    x = 204,751,834,760.79/479,203.48
  6. Step 6: Final answer
    x = 427,275.35

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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.