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Finding the Fourth Proportional to 2,153.98, 3,230.43 and 692.74

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Solution

The fourth proportional to 2,153.98, 3,230.43 and 692.74 is: 1,038.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,153.98 : 3,230.43 = 692.74 : x
  2. Step 2: Convert to fraction form
    2,153.98/3,230.43 = 692.74/x
  3. Step 3: Cross multiply
    2,153.98x = 3,230.43 × 692.74
  4. Step 4: Simplify right side
    2,153.98x = 2,237,848.08
  5. Step 5: Solve for x
    x = 2,237,848.08/2,153.98
  6. Step 6: Final answer
    x = 1,038.94

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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.