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Finding the Fourth Proportional to 1,366.64, 1,885.99 and 745.64

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Solution

The fourth proportional to 1,366.64, 1,885.99 and 745.64 is: 1,029.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,366.64 : 1,885.99 = 745.64 : x
  2. Step 2: Convert to fraction form
    1,366.64/1,885.99 = 745.64/x
  3. Step 3: Cross multiply
    1,366.64x = 1,885.99 × 745.64
  4. Step 4: Simplify right side
    1,366.64x = 1,406,269.58
  5. Step 5: Solve for x
    x = 1,406,269.58/1,366.64
  6. Step 6: Final answer
    x = 1,029.00

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.