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Finding the Fourth Proportional to 823.34, 1,235.19 and 275.51

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Solution

The fourth proportional to 823.34, 1,235.19 and 275.51 is: 413.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    823.34 : 1,235.19 = 275.51 : x
  2. Step 2: Convert to fraction form
    823.34/1,235.19 = 275.51/x
  3. Step 3: Cross multiply
    823.34x = 1,235.19 × 275.51
  4. Step 4: Simplify right side
    823.34x = 340,307.20
  5. Step 5: Solve for x
    x = 340,307.20/823.34
  6. Step 6: Final answer
    x = 413.33

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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.