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Finding the Fourth Proportional to 1,805.06, 2,708.40 and 928.10

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Solution

The fourth proportional to 1,805.06, 2,708.40 and 928.10 is: 1,392.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,805.06 : 2,708.40 = 928.10 : x
  2. Step 2: Convert to fraction form
    1,805.06/2,708.40 = 928.10/x
  3. Step 3: Cross multiply
    1,805.06x = 2,708.40 × 928.10
  4. Step 4: Simplify right side
    1,805.06x = 2,513,666.04
  5. Step 5: Solve for x
    x = 2,513,666.04/1,805.06
  6. Step 6: Final answer
    x = 1,392.57

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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.