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Finding the Fourth Proportional to 387,704.36, 534,966.81 and 215,599.76

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Solution

The fourth proportional to 387,704.36, 534,966.81 and 215,599.76 is: 297,491.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,704.36 : 534,966.81 = 215,599.76 : x
  2. Step 2: Convert to fraction form
    387,704.36/534,966.81 = 215,599.76/x
  3. Step 3: Cross multiply
    387,704.36x = 534,966.81 × 215,599.76
  4. Step 4: Simplify right side
    387,704.36x = 115,338,715,843.97
  5. Step 5: Solve for x
    x = 115,338,715,843.97/387,704.36
  6. Step 6: Final answer
    x = 297,491.41

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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.