Home / 387,826.28-535,193.79-215,742.18

Finding the Fourth Proportional to 387,826.28, 535,193.79 and 215,742.18

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Solution

The fourth proportional to 387,826.28, 535,193.79 and 215,742.18 is: 297,720.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,826.28 : 535,193.79 = 215,742.18 : x
  2. Step 2: Convert to fraction form
    387,826.28/535,193.79 = 215,742.18/x
  3. Step 3: Cross multiply
    387,826.28x = 535,193.79 × 215,742.18
  4. Step 4: Simplify right side
    387,826.28x = 115,463,874,977.06
  5. Step 5: Solve for x
    x = 115,463,874,977.06/387,826.28
  6. Step 6: Final answer
    x = 297,720.61

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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.