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Finding the Fourth Proportional to 1,962.88, 2,945.55 and 808.63

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Solution

The fourth proportional to 1,962.88, 2,945.55 and 808.63 is: 1,213.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,962.88 : 2,945.55 = 808.63 : x
  2. Step 2: Convert to fraction form
    1,962.88/2,945.55 = 808.63/x
  3. Step 3: Cross multiply
    1,962.88x = 2,945.55 × 808.63
  4. Step 4: Simplify right side
    1,962.88x = 2,381,860.10
  5. Step 5: Solve for x
    x = 2,381,860.10/1,962.88
  6. Step 6: Final answer
    x = 1,213.45

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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.