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Finding the Fourth Proportional to 1,055.56, 1,583.34 and 670

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Solution

The fourth proportional to 1,055.56, 1,583.34 and 670 is: 1,005.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,055.56 : 1,583.34 = 670 : x
  2. Step 2: Convert to fraction form
    1,055.56/1,583.34 = 670/x
  3. Step 3: Cross multiply
    1,055.56x = 1,583.34 × 670
  4. Step 4: Simplify right side
    1,055.56x = 1,060,837.80
  5. Step 5: Solve for x
    x = 1,060,837.80/1,055.56
  6. Step 6: Final answer
    x = 1,005.00

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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.