Home / 1,317.02-1,813.79-1,288.32

Finding the Fourth Proportional to 1,317.02, 1,813.79 and 1,288.32

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Solution

The fourth proportional to 1,317.02, 1,813.79 and 1,288.32 is: 1,774.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,317.02 : 1,813.79 = 1,288.32 : x
  2. Step 2: Convert to fraction form
    1,317.02/1,813.79 = 1,288.32/x
  3. Step 3: Cross multiply
    1,317.02x = 1,813.79 × 1,288.32
  4. Step 4: Simplify right side
    1,317.02x = 2,336,735.49
  5. Step 5: Solve for x
    x = 2,336,735.49/1,317.02
  6. Step 6: Final answer
    x = 1,774.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.