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Finding the Fourth Proportional to 554.66, 830.91 and 266.30

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Solution

The fourth proportional to 554.66, 830.91 and 266.30 is: 398.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    554.66 : 830.91 = 266.30 : x
  2. Step 2: Convert to fraction form
    554.66/830.91 = 266.30/x
  3. Step 3: Cross multiply
    554.66x = 830.91 × 266.30
  4. Step 4: Simplify right side
    554.66x = 221,271.33
  5. Step 5: Solve for x
    x = 221,271.33/554.66
  6. Step 6: Final answer
    x = 398.93

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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.