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Finding the Fourth Proportional to 1,777.84, 2,453.49 and 991.93

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Solution

The fourth proportional to 1,777.84, 2,453.49 and 991.93 is: 1,368.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,777.84 : 2,453.49 = 991.93 : x
  2. Step 2: Convert to fraction form
    1,777.84/2,453.49 = 991.93/x
  3. Step 3: Cross multiply
    1,777.84x = 2,453.49 × 991.93
  4. Step 4: Simplify right side
    1,777.84x = 2,433,690.34
  5. Step 5: Solve for x
    x = 2,433,690.34/1,777.84
  6. Step 6: Final answer
    x = 1,368.90

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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.