Home / 387,910.55-535,319.19-215,835.75

Finding the Fourth Proportional to 387,910.55, 535,319.19 and 215,835.75

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Solution

The fourth proportional to 387,910.55, 535,319.19 and 215,835.75 is: 297,854.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,910.55 : 535,319.19 = 215,835.75 : x
  2. Step 2: Convert to fraction form
    387,910.55/535,319.19 = 215,835.75/x
  3. Step 3: Cross multiply
    387,910.55x = 535,319.19 × 215,835.75
  4. Step 4: Simplify right side
    387,910.55x = 115,541,018,863.04
  5. Step 5: Solve for x
    x = 115,541,018,863.04/387,910.55
  6. Step 6: Final answer
    x = 297,854.80

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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.