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Finding the Fourth Proportional to 1,583.55, 2,185.77 and 920.28

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Solution

The fourth proportional to 1,583.55, 2,185.77 and 920.28 is: 1,270.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,583.55 : 2,185.77 = 920.28 : x
  2. Step 2: Convert to fraction form
    1,583.55/2,185.77 = 920.28/x
  3. Step 3: Cross multiply
    1,583.55x = 2,185.77 × 920.28
  4. Step 4: Simplify right side
    1,583.55x = 2,011,520.42
  5. Step 5: Solve for x
    x = 2,011,520.42/1,583.55
  6. Step 6: Final answer
    x = 1,270.26

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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.