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Finding the Fourth Proportional to 387,290.69, 534,511.27 and 217,524.81

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Solution

The fourth proportional to 387,290.69, 534,511.27 and 217,524.81 is: 300,212.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,290.69 : 534,511.27 = 217,524.81 : x
  2. Step 2: Convert to fraction form
    387,290.69/534,511.27 = 217,524.81/x
  3. Step 3: Cross multiply
    387,290.69x = 534,511.27 × 217,524.81
  4. Step 4: Simplify right side
    387,290.69x = 116,269,462,449.61
  5. Step 5: Solve for x
    x = 116,269,462,449.61/387,290.69
  6. Step 6: Final answer
    x = 300,212.39

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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.