Home / 1,223.67-1,835.55-390.90

Finding the Fourth Proportional to 1,223.67, 1,835.55 and 390.90

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Solution

The fourth proportional to 1,223.67, 1,835.55 and 390.90 is: 586.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,223.67 : 1,835.55 = 390.90 : x
  2. Step 2: Convert to fraction form
    1,223.67/1,835.55 = 390.90/x
  3. Step 3: Cross multiply
    1,223.67x = 1,835.55 × 390.90
  4. Step 4: Simplify right side
    1,223.67x = 717,516.50
  5. Step 5: Solve for x
    x = 717,516.50/1,223.67
  6. Step 6: Final answer
    x = 586.36

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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.