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Finding the Fourth Proportional to 1,187.76, 1,779.66 and 1,051.68

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Solution

The fourth proportional to 1,187.76, 1,779.66 and 1,051.68 is: 1,575.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187.76 : 1,779.66 = 1,051.68 : x
  2. Step 2: Convert to fraction form
    1,187.76/1,779.66 = 1,051.68/x
  3. Step 3: Cross multiply
    1,187.76x = 1,779.66 × 1,051.68
  4. Step 4: Simplify right side
    1,187.76x = 1,871,632.83
  5. Step 5: Solve for x
    x = 1,871,632.83/1,187.76
  6. Step 6: Final answer
    x = 1,575.77

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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.