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Finding the Fourth Proportional to 1,786.93, 2,681.08 and 692.08

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Solution

The fourth proportional to 1,786.93, 2,681.08 and 692.08 is: 1,038.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,786.93 : 2,681.08 = 692.08 : x
  2. Step 2: Convert to fraction form
    1,786.93/2,681.08 = 692.08/x
  3. Step 3: Cross multiply
    1,786.93x = 2,681.08 × 692.08
  4. Step 4: Simplify right side
    1,786.93x = 1,855,513.41
  5. Step 5: Solve for x
    x = 1,855,513.41/1,786.93
  6. Step 6: Final answer
    x = 1,038.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.