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Finding the Fourth Proportional to 665,055.56, 917,780.32 and 363,249.56

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Solution

The fourth proportional to 665,055.56, 917,780.32 and 363,249.56 is: 501,286.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,055.56 : 917,780.32 = 363,249.56 : x
  2. Step 2: Convert to fraction form
    665,055.56/917,780.32 = 363,249.56/x
  3. Step 3: Cross multiply
    665,055.56x = 917,780.32 × 363,249.56
  4. Step 4: Simplify right side
    665,055.56x = 333,383,300,165.17
  5. Step 5: Solve for x
    x = 333,383,300,165.17/665,055.56
  6. Step 6: Final answer
    x = 501,286.39

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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.