Home / 1,210.80-1,815.74-517.03

Finding the Fourth Proportional to 1,210.80, 1,815.74 and 517.03

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Solution

The fourth proportional to 1,210.80, 1,815.74 and 517.03 is: 775.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,210.80 : 1,815.74 = 517.03 : x
  2. Step 2: Convert to fraction form
    1,210.80/1,815.74 = 517.03/x
  3. Step 3: Cross multiply
    1,210.80x = 1,815.74 × 517.03
  4. Step 4: Simplify right side
    1,210.80x = 938,792.05
  5. Step 5: Solve for x
    x = 938,792.05/1,210.80
  6. Step 6: Final answer
    x = 775.35

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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.