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Finding the Fourth Proportional to 1,985.58, 2,978.82 and 1,060.64

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Solution

The fourth proportional to 1,985.58, 2,978.82 and 1,060.64 is: 1,591.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,985.58 : 2,978.82 = 1,060.64 : x
  2. Step 2: Convert to fraction form
    1,985.58/2,978.82 = 1,060.64/x
  3. Step 3: Cross multiply
    1,985.58x = 2,978.82 × 1,060.64
  4. Step 4: Simplify right side
    1,985.58x = 3,159,455.64
  5. Step 5: Solve for x
    x = 3,159,455.64/1,985.58
  6. Step 6: Final answer
    x = 1,591.20

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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.