Home / 1,917.84-2,646.70-1,172.14

Finding the Fourth Proportional to 1,917.84, 2,646.70 and 1,172.14

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Solution

The fourth proportional to 1,917.84, 2,646.70 and 1,172.14 is: 1,617.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,917.84 : 2,646.70 = 1,172.14 : x
  2. Step 2: Convert to fraction form
    1,917.84/2,646.70 = 1,172.14/x
  3. Step 3: Cross multiply
    1,917.84x = 2,646.70 × 1,172.14
  4. Step 4: Simplify right side
    1,917.84x = 3,102,302.94
  5. Step 5: Solve for x
    x = 3,102,302.94/1,917.84
  6. Step 6: Final answer
    x = 1,617.60

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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.