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Finding the Fourth Proportional to 391,107.36, 539,728.26 and 212,259.36

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Solution

The fourth proportional to 391,107.36, 539,728.26 and 212,259.36 is: 292,917.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,107.36 : 539,728.26 = 212,259.36 : x
  2. Step 2: Convert to fraction form
    391,107.36/539,728.26 = 212,259.36/x
  3. Step 3: Cross multiply
    391,107.36x = 539,728.26 × 212,259.36
  4. Step 4: Simplify right side
    391,107.36x = 114,562,375,041.51
  5. Step 5: Solve for x
    x = 114,562,375,041.51/391,107.36
  6. Step 6: Final answer
    x = 292,917.97

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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.