Home / 1,217.02-1,810.55-1,212.70

Finding the Fourth Proportional to 1,217.02, 1,810.55 and 1,212.70

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Solution

The fourth proportional to 1,217.02, 1,810.55 and 1,212.70 is: 1,804.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,217.02 : 1,810.55 = 1,212.70 : x
  2. Step 2: Convert to fraction form
    1,217.02/1,810.55 = 1,212.70/x
  3. Step 3: Cross multiply
    1,217.02x = 1,810.55 × 1,212.70
  4. Step 4: Simplify right side
    1,217.02x = 2,195,653.99
  5. Step 5: Solve for x
    x = 2,195,653.99/1,217.02
  6. Step 6: Final answer
    x = 1,804.12

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.