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Finding the Fourth Proportional to 387,759.88, 535,074.42 and 215,670.52

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Solution

The fourth proportional to 387,759.88, 535,074.42 and 215,670.52 is: 297,606.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,759.88 : 535,074.42 = 215,670.52 : x
  2. Step 2: Convert to fraction form
    387,759.88/535,074.42 = 215,670.52/x
  3. Step 3: Cross multiply
    387,759.88x = 535,074.42 × 215,670.52
  4. Step 4: Simplify right side
    387,759.88x = 115,399,778,400.10
  5. Step 5: Solve for x
    x = 115,399,778,400.10/387,759.88
  6. Step 6: Final answer
    x = 297,606.29

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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.