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Finding the Fourth Proportional to 553.65, 830.53 and 279.57

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Solution

The fourth proportional to 553.65, 830.53 and 279.57 is: 419.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    553.65 : 830.53 = 279.57 : x
  2. Step 2: Convert to fraction form
    553.65/830.53 = 279.57/x
  3. Step 3: Cross multiply
    553.65x = 830.53 × 279.57
  4. Step 4: Simplify right side
    553.65x = 232,191.27
  5. Step 5: Solve for x
    x = 232,191.27/553.65
  6. Step 6: Final answer
    x = 419.38

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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.