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Finding the Fourth Proportional to 554.33, 830.05 and 381.53

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Solution

The fourth proportional to 554.33, 830.05 and 381.53 is: 571.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    554.33 : 830.05 = 381.53 : x
  2. Step 2: Convert to fraction form
    554.33/830.05 = 381.53/x
  3. Step 3: Cross multiply
    554.33x = 830.05 × 381.53
  4. Step 4: Simplify right side
    554.33x = 316,688.98
  5. Step 5: Solve for x
    x = 316,688.98/554.33
  6. Step 6: Final answer
    x = 571.30

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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.