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Finding the Fourth Proportional to 1,985.76, 2,962.80 and 1,776.96

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Solution

The fourth proportional to 1,985.76, 2,962.80 and 1,776.96 is: 2,651.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,985.76 : 2,962.80 = 1,776.96 : x
  2. Step 2: Convert to fraction form
    1,985.76/2,962.80 = 1,776.96/x
  3. Step 3: Cross multiply
    1,985.76x = 2,962.80 × 1,776.96
  4. Step 4: Simplify right side
    1,985.76x = 5,264,777.09
  5. Step 5: Solve for x
    x = 5,264,777.09/1,985.76
  6. Step 6: Final answer
    x = 2,651.27

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.