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Finding the Fourth Proportional to 553.17, 829.55 and 279.50

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Solution

The fourth proportional to 553.17, 829.55 and 279.50 is: 419.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    553.17 : 829.55 = 279.50 : x
  2. Step 2: Convert to fraction form
    553.17/829.55 = 279.50/x
  3. Step 3: Cross multiply
    553.17x = 829.55 × 279.50
  4. Step 4: Simplify right side
    553.17x = 231,855.78
  5. Step 5: Solve for x
    x = 231,855.78/553.17
  6. Step 6: Final answer
    x = 419.14

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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.