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Finding the Fourth Proportional to 839.99, 1,256.39 and 606.26

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Solution

The fourth proportional to 839.99, 1,256.39 and 606.26 is: 906.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    839.99 : 1,256.39 = 606.26 : x
  2. Step 2: Convert to fraction form
    839.99/1,256.39 = 606.26/x
  3. Step 3: Cross multiply
    839.99x = 1,256.39 × 606.26
  4. Step 4: Simplify right side
    839.99x = 761,699.00
  5. Step 5: Solve for x
    x = 761,699.00/839.99
  6. Step 6: Final answer
    x = 906.80

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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.