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Finding the Fourth Proportional to 1,326.08, 1,989.64 and 1,068.50

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Solution

The fourth proportional to 1,326.08, 1,989.64 and 1,068.50 is: 1,603.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,326.08 : 1,989.64 = 1,068.50 : x
  2. Step 2: Convert to fraction form
    1,326.08/1,989.64 = 1,068.50/x
  3. Step 3: Cross multiply
    1,326.08x = 1,989.64 × 1,068.50
  4. Step 4: Simplify right side
    1,326.08x = 2,125,930.34
  5. Step 5: Solve for x
    x = 2,125,930.34/1,326.08
  6. Step 6: Final answer
    x = 1,603.17

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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.