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Finding the Fourth Proportional to 665,021.80, 917,751.93 and 363,215.80

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Solution

The fourth proportional to 665,021.80, 917,751.93 and 363,215.80 is: 501,249.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,021.80 : 917,751.93 = 363,215.80 : x
  2. Step 2: Convert to fraction form
    665,021.80/917,751.93 = 363,215.80/x
  3. Step 3: Cross multiply
    665,021.80x = 917,751.93 × 363,215.80
  4. Step 4: Simplify right side
    665,021.80x = 333,342,001,456.49
  5. Step 5: Solve for x
    x = 333,342,001,456.49/665,021.80
  6. Step 6: Final answer
    x = 501,249.74

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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.