Home / 1,312.06-1,966.80-445.78

Finding the Fourth Proportional to 1,312.06, 1,966.80 and 445.78

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Solution

The fourth proportional to 1,312.06, 1,966.80 and 445.78 is: 668.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,312.06 : 1,966.80 = 445.78 : x
  2. Step 2: Convert to fraction form
    1,312.06/1,966.80 = 445.78/x
  3. Step 3: Cross multiply
    1,312.06x = 1,966.80 × 445.78
  4. Step 4: Simplify right side
    1,312.06x = 876,760.10
  5. Step 5: Solve for x
    x = 876,760.10/1,312.06
  6. Step 6: Final answer
    x = 668.23

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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.