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Finding the Fourth Proportional to 217,644.39, 326,269.40 and 77,370.21

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Solution

The fourth proportional to 217,644.39, 326,269.40 and 77,370.21 is: 115,985.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,644.39 : 326,269.40 = 77,370.21 : x
  2. Step 2: Convert to fraction form
    217,644.39/326,269.40 = 77,370.21/x
  3. Step 3: Cross multiply
    217,644.39x = 326,269.40 × 77,370.21
  4. Step 4: Simplify right side
    217,644.39x = 25,243,531,607.72
  5. Step 5: Solve for x
    x = 25,243,531,607.72/217,644.39
  6. Step 6: Final answer
    x = 115,985.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.