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Finding the Fourth Proportional to 948.95, 1,423.26 and 255.69

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Solution

The fourth proportional to 948.95, 1,423.26 and 255.69 is: 383.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    948.95 : 1,423.26 = 255.69 : x
  2. Step 2: Convert to fraction form
    948.95/1,423.26 = 255.69/x
  3. Step 3: Cross multiply
    948.95x = 1,423.26 × 255.69
  4. Step 4: Simplify right side
    948.95x = 363,918.69
  5. Step 5: Solve for x
    x = 363,918.69/948.95
  6. Step 6: Final answer
    x = 383.50

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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.