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Finding the Fourth Proportional to 1,315.19, 1,968.68 and 968.92

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Solution

The fourth proportional to 1,315.19, 1,968.68 and 968.92 is: 1,450.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,315.19 : 1,968.68 = 968.92 : x
  2. Step 2: Convert to fraction form
    1,315.19/1,968.68 = 968.92/x
  3. Step 3: Cross multiply
    1,315.19x = 1,968.68 × 968.92
  4. Step 4: Simplify right side
    1,315.19x = 1,907,493.43
  5. Step 5: Solve for x
    x = 1,907,493.43/1,315.19
  6. Step 6: Final answer
    x = 1,450.36

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1.5x scale

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.