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Finding the Fourth Proportional to 380,691.36, 525,393.54 and 219,582.36

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Solution

The fourth proportional to 380,691.36, 525,393.54 and 219,582.36 is: 303,046.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,691.36 : 525,393.54 = 219,582.36 : x
  2. Step 2: Convert to fraction form
    380,691.36/525,393.54 = 219,582.36/x
  3. Step 3: Cross multiply
    380,691.36x = 525,393.54 × 219,582.36
  4. Step 4: Simplify right side
    380,691.36x = 115,367,153,441.95
  5. Step 5: Solve for x
    x = 115,367,153,441.95/380,691.36
  6. Step 6: Final answer
    x = 303,046.42

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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.