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Finding the Fourth Proportional to 912.88, 1,369.55 and 263.62

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Solution

The fourth proportional to 912.88, 1,369.55 and 263.62 is: 395.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    912.88 : 1,369.55 = 263.62 : x
  2. Step 2: Convert to fraction form
    912.88/1,369.55 = 263.62/x
  3. Step 3: Cross multiply
    912.88x = 1,369.55 × 263.62
  4. Step 4: Simplify right side
    912.88x = 361,040.77
  5. Step 5: Solve for x
    x = 361,040.77/912.88
  6. Step 6: Final answer
    x = 395.50

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Half scale
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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.