Home / 1,220.24-1,830.80-489.87

Finding the Fourth Proportional to 1,220.24, 1,830.80 and 489.87

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Solution

The fourth proportional to 1,220.24, 1,830.80 and 489.87 is: 734.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,220.24 : 1,830.80 = 489.87 : x
  2. Step 2: Convert to fraction form
    1,220.24/1,830.80 = 489.87/x
  3. Step 3: Cross multiply
    1,220.24x = 1,830.80 × 489.87
  4. Step 4: Simplify right side
    1,220.24x = 896,855.22
  5. Step 5: Solve for x
    x = 896,855.22/1,220.24
  6. Step 6: Final answer
    x = 734.98

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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.