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Finding the Fourth Proportional to 1,368.69, 2,062.19 and 1,238.84

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Solution

The fourth proportional to 1,368.69, 2,062.19 and 1,238.84 is: 1,866.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,368.69 : 2,062.19 = 1,238.84 : x
  2. Step 2: Convert to fraction form
    1,368.69/2,062.19 = 1,238.84/x
  3. Step 3: Cross multiply
    1,368.69x = 2,062.19 × 1,238.84
  4. Step 4: Simplify right side
    1,368.69x = 2,554,731.71
  5. Step 5: Solve for x
    x = 2,554,731.71/1,368.69
  6. Step 6: Final answer
    x = 1,866.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.