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Finding the Fourth Proportional to 1,264.70, 1,745.19 and 705.15

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Solution

The fourth proportional to 1,264.70, 1,745.19 and 705.15 is: 973.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,264.70 : 1,745.19 = 705.15 : x
  2. Step 2: Convert to fraction form
    1,264.70/1,745.19 = 705.15/x
  3. Step 3: Cross multiply
    1,264.70x = 1,745.19 × 705.15
  4. Step 4: Simplify right side
    1,264.70x = 1,230,620.73
  5. Step 5: Solve for x
    x = 1,230,620.73/1,264.70
  6. Step 6: Final answer
    x = 973.05

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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.