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Finding the Fourth Proportional to 387,594.54, 534,815.61 and 215,507.70

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Solution

The fourth proportional to 387,594.54, 534,815.61 and 215,507.70 is: 297,364.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,594.54 : 534,815.61 = 215,507.70 : x
  2. Step 2: Convert to fraction form
    387,594.54/534,815.61 = 215,507.70/x
  3. Step 3: Cross multiply
    387,594.54x = 534,815.61 × 215,507.70
  4. Step 4: Simplify right side
    387,594.54x = 115,256,882,035.20
  5. Step 5: Solve for x
    x = 115,256,882,035.20/387,594.54
  6. Step 6: Final answer
    x = 297,364.57

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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.