Home / 1,220.50-1,829.83-398.29

Finding the Fourth Proportional to 1,220.50, 1,829.83 and 398.29

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Solution

The fourth proportional to 1,220.50, 1,829.83 and 398.29 is: 597.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,220.50 : 1,829.83 = 398.29 : x
  2. Step 2: Convert to fraction form
    1,220.50/1,829.83 = 398.29/x
  3. Step 3: Cross multiply
    1,220.50x = 1,829.83 × 398.29
  4. Step 4: Simplify right side
    1,220.50x = 728,802.99
  5. Step 5: Solve for x
    x = 728,802.99/1,220.50
  6. Step 6: Final answer
    x = 597.13

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1.5x scale

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.