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Finding the Fourth Proportional to 1,368.36, 1,888.52 and 778.94

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Solution

The fourth proportional to 1,368.36, 1,888.52 and 778.94 is: 1,075.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,368.36 : 1,888.52 = 778.94 : x
  2. Step 2: Convert to fraction form
    1,368.36/1,888.52 = 778.94/x
  3. Step 3: Cross multiply
    1,368.36x = 1,888.52 × 778.94
  4. Step 4: Simplify right side
    1,368.36x = 1,471,043.77
  5. Step 5: Solve for x
    x = 1,471,043.77/1,368.36
  6. Step 6: Final answer
    x = 1,075.04

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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.