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Finding the Fourth Proportional to 638,613.88, 881,268.26 and 352,133.88

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Solution

The fourth proportional to 638,613.88, 881,268.26 and 352,133.88 is: 485,934.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,613.88 : 881,268.26 = 352,133.88 : x
  2. Step 2: Convert to fraction form
    638,613.88/881,268.26 = 352,133.88/x
  3. Step 3: Cross multiply
    638,613.88x = 881,268.26 × 352,133.88
  4. Step 4: Simplify right side
    638,613.88x = 310,324,411,714.65
  5. Step 5: Solve for x
    x = 310,324,411,714.65/638,613.88
  6. Step 6: Final answer
    x = 485,934.34

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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.