Home / 1,239.21-1,858.35-406.08

Finding the Fourth Proportional to 1,239.21, 1,858.35 and 406.08

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Solution

The fourth proportional to 1,239.21, 1,858.35 and 406.08 is: 608.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,239.21 : 1,858.35 = 406.08 : x
  2. Step 2: Convert to fraction form
    1,239.21/1,858.35 = 406.08/x
  3. Step 3: Cross multiply
    1,239.21x = 1,858.35 × 406.08
  4. Step 4: Simplify right side
    1,239.21x = 754,638.77
  5. Step 5: Solve for x
    x = 754,638.77/1,239.21
  6. Step 6: Final answer
    x = 608.97

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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.