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Finding the Fourth Proportional to 1,178.95, 1,779.50 and 1,178.95

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Solution

The fourth proportional to 1,178.95, 1,779.50 and 1,178.95 is: 1,779.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,178.95 : 1,779.50 = 1,178.95 : x
  2. Step 2: Convert to fraction form
    1,178.95/1,779.50 = 1,178.95/x
  3. Step 3: Cross multiply
    1,178.95x = 1,779.50 × 1,178.95
  4. Step 4: Simplify right side
    1,178.95x = 2,097,926.73
  5. Step 5: Solve for x
    x = 2,097,926.73/1,178.95
  6. Step 6: Final answer
    x = 1,779.50

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.