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Finding the Fourth Proportional to 1,294.81, 1,786.88 and 705.36

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Solution

The fourth proportional to 1,294.81, 1,786.88 and 705.36 is: 973.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,294.81 : 1,786.88 = 705.36 : x
  2. Step 2: Convert to fraction form
    1,294.81/1,786.88 = 705.36/x
  3. Step 3: Cross multiply
    1,294.81x = 1,786.88 × 705.36
  4. Step 4: Simplify right side
    1,294.81x = 1,260,393.68
  5. Step 5: Solve for x
    x = 1,260,393.68/1,294.81
  6. Step 6: Final answer
    x = 973.42

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1.5x scale

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.