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Finding the Fourth Proportional to 391,107.25, 539,728.01 and 212,259.25

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Solution

The fourth proportional to 391,107.25, 539,728.01 and 212,259.25 is: 292,917.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,107.25 : 539,728.01 = 212,259.25 : x
  2. Step 2: Convert to fraction form
    391,107.25/539,728.01 = 212,259.25/x
  3. Step 3: Cross multiply
    391,107.25x = 539,728.01 × 212,259.25
  4. Step 4: Simplify right side
    391,107.25x = 114,562,262,606.59
  5. Step 5: Solve for x
    x = 114,562,262,606.59/391,107.25
  6. Step 6: Final answer
    x = 292,917.77

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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.