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Finding the Fourth Proportional to 554.05, 831.58 and 280.33

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Solution

The fourth proportional to 554.05, 831.58 and 280.33 is: 420.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    554.05 : 831.58 = 280.33 : x
  2. Step 2: Convert to fraction form
    554.05/831.58 = 280.33/x
  3. Step 3: Cross multiply
    554.05x = 831.58 × 280.33
  4. Step 4: Simplify right side
    554.05x = 233,116.82
  5. Step 5: Solve for x
    x = 233,116.82/554.05
  6. Step 6: Final answer
    x = 420.75

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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.