Home / 1,918.79-2,648.69-1,210.49

Finding the Fourth Proportional to 1,918.79, 2,648.69 and 1,210.49

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Solution

The fourth proportional to 1,918.79, 2,648.69 and 1,210.49 is: 1,670.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,918.79 : 2,648.69 = 1,210.49 : x
  2. Step 2: Convert to fraction form
    1,918.79/2,648.69 = 1,210.49/x
  3. Step 3: Cross multiply
    1,918.79x = 2,648.69 × 1,210.49
  4. Step 4: Simplify right side
    1,918.79x = 3,206,193.46
  5. Step 5: Solve for x
    x = 3,206,193.46/1,918.79
  6. Step 6: Final answer
    x = 1,670.95

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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.