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Finding the Fourth Proportional to 1,015.93, 1,523.89 and 285.49

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Solution

The fourth proportional to 1,015.93, 1,523.89 and 285.49 is: 428.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,015.93 : 1,523.89 = 285.49 : x
  2. Step 2: Convert to fraction form
    1,015.93/1,523.89 = 285.49/x
  3. Step 3: Cross multiply
    1,015.93x = 1,523.89 × 285.49
  4. Step 4: Simplify right side
    1,015.93x = 435,047.74
  5. Step 5: Solve for x
    x = 435,047.74/1,015.93
  6. Step 6: Final answer
    x = 428.23

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Double scale
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Similar ratio
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1.5x scale

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.