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Finding the Fourth Proportional to 1,555.23, 2,145.86 and 883.07

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Solution

The fourth proportional to 1,555.23, 2,145.86 and 883.07 is: 1,218.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,555.23 : 2,145.86 = 883.07 : x
  2. Step 2: Convert to fraction form
    1,555.23/2,145.86 = 883.07/x
  3. Step 3: Cross multiply
    1,555.23x = 2,145.86 × 883.07
  4. Step 4: Simplify right side
    1,555.23x = 1,894,940.80
  5. Step 5: Solve for x
    x = 1,894,940.80/1,555.23
  6. Step 6: Final answer
    x = 1,218.43

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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.