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Finding the Fourth Proportional to 1,294.58, 1,786.54 and 705.13

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Solution

The fourth proportional to 1,294.58, 1,786.54 and 705.13 is: 973.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,294.58 : 1,786.54 = 705.13 : x
  2. Step 2: Convert to fraction form
    1,294.58/1,786.54 = 705.13/x
  3. Step 3: Cross multiply
    1,294.58x = 1,786.54 × 705.13
  4. Step 4: Simplify right side
    1,294.58x = 1,259,742.95
  5. Step 5: Solve for x
    x = 1,259,742.95/1,294.58
  6. Step 6: Final answer
    x = 973.09

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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.