Home / 1,788.27-2,681.90-692.40

Finding the Fourth Proportional to 1,788.27, 2,681.90 and 692.40

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Solution

The fourth proportional to 1,788.27, 2,681.90 and 692.40 is: 1,038.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,788.27 : 2,681.90 = 692.40 : x
  2. Step 2: Convert to fraction form
    1,788.27/2,681.90 = 692.40/x
  3. Step 3: Cross multiply
    1,788.27x = 2,681.90 × 692.40
  4. Step 4: Simplify right side
    1,788.27x = 1,856,944.10
  5. Step 5: Solve for x
    x = 1,856,944.10/1,788.27
  6. Step 6: Final answer
    x = 1,038.40

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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.