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Finding the Fourth Proportional to 387,295.41, 534,456.97 and 215,208.93

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Solution

The fourth proportional to 387,295.41, 534,456.97 and 215,208.93 is: 296,982.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,295.41 : 534,456.97 = 215,208.93 : x
  2. Step 2: Convert to fraction form
    387,295.41/534,456.97 = 215,208.93/x
  3. Step 3: Cross multiply
    387,295.41x = 534,456.97 × 215,208.93
  4. Step 4: Simplify right side
    387,295.41x = 115,019,910,509.37
  5. Step 5: Solve for x
    x = 115,019,910,509.37/387,295.41
  6. Step 6: Final answer
    x = 296,982.37

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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.