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Finding the Fourth Proportional to 1,245.50, 1,868.25 and 333.50

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Solution

The fourth proportional to 1,245.50, 1,868.25 and 333.50 is: 500.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,245.50 : 1,868.25 = 333.50 : x
  2. Step 2: Convert to fraction form
    1,245.50/1,868.25 = 333.50/x
  3. Step 3: Cross multiply
    1,245.50x = 1,868.25 × 333.50
  4. Step 4: Simplify right side
    1,245.50x = 623,061.38
  5. Step 5: Solve for x
    x = 623,061.38/1,245.50
  6. Step 6: Final answer
    x = 500.25

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Double scale
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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.