Home / 1,705.68-2,356.20-1,317.60

Finding the Fourth Proportional to 1,705.68, 2,356.20 and 1,317.60

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Solution

The fourth proportional to 1,705.68, 2,356.20 and 1,317.60 is: 1,820.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,705.68 : 2,356.20 = 1,317.60 : x
  2. Step 2: Convert to fraction form
    1,705.68/2,356.20 = 1,317.60/x
  3. Step 3: Cross multiply
    1,705.68x = 2,356.20 × 1,317.60
  4. Step 4: Simplify right side
    1,705.68x = 3,104,529.12
  5. Step 5: Solve for x
    x = 3,104,529.12/1,705.68
  6. Step 6: Final answer
    x = 1,820.11

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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.