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Finding the Fourth Proportional to 1,188.05, 1,779.58 and 955.67

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Solution

The fourth proportional to 1,188.05, 1,779.58 and 955.67 is: 1,431.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,188.05 : 1,779.58 = 955.67 : x
  2. Step 2: Convert to fraction form
    1,188.05/1,779.58 = 955.67/x
  3. Step 3: Cross multiply
    1,188.05x = 1,779.58 × 955.67
  4. Step 4: Simplify right side
    1,188.05x = 1,700,693.28
  5. Step 5: Solve for x
    x = 1,700,693.28/1,188.05
  6. Step 6: Final answer
    x = 1,431.51

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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.