Home / 1,239.04-1,858.06-459.09

Finding the Fourth Proportional to 1,239.04, 1,858.06 and 459.09

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Solution

The fourth proportional to 1,239.04, 1,858.06 and 459.09 is: 688.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,239.04 : 1,858.06 = 459.09 : x
  2. Step 2: Convert to fraction form
    1,239.04/1,858.06 = 459.09/x
  3. Step 3: Cross multiply
    1,239.04x = 1,858.06 × 459.09
  4. Step 4: Simplify right side
    1,239.04x = 853,014.76
  5. Step 5: Solve for x
    x = 853,014.76/1,239.04
  6. Step 6: Final answer
    x = 688.45

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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.