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Finding the Fourth Proportional to 846.21, 1,269.01 and 290.81

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Solution

The fourth proportional to 846.21, 1,269.01 and 290.81 is: 436.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    846.21 : 1,269.01 = 290.81 : x
  2. Step 2: Convert to fraction form
    846.21/1,269.01 = 290.81/x
  3. Step 3: Cross multiply
    846.21x = 1,269.01 × 290.81
  4. Step 4: Simplify right side
    846.21x = 369,044.33
  5. Step 5: Solve for x
    x = 369,044.33/846.21
  6. Step 6: Final answer
    x = 436.11

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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.