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Finding the Fourth Proportional to 1,659.13, 2,289.74 and 913.23

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Solution

The fourth proportional to 1,659.13, 2,289.74 and 913.23 is: 1,260.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,659.13 : 2,289.74 = 913.23 : x
  2. Step 2: Convert to fraction form
    1,659.13/2,289.74 = 913.23/x
  3. Step 3: Cross multiply
    1,659.13x = 2,289.74 × 913.23
  4. Step 4: Simplify right side
    1,659.13x = 2,091,059.26
  5. Step 5: Solve for x
    x = 2,091,059.26/1,659.13
  6. Step 6: Final answer
    x = 1,260.33

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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.