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Finding the Fourth Proportional to 353.28, 530.15 and 266.81

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Solution

The fourth proportional to 353.28, 530.15 and 266.81 is: 400.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    353.28 : 530.15 = 266.81 : x
  2. Step 2: Convert to fraction form
    353.28/530.15 = 266.81/x
  3. Step 3: Cross multiply
    353.28x = 530.15 × 266.81
  4. Step 4: Simplify right side
    353.28x = 141,448.32
  5. Step 5: Solve for x
    x = 141,448.32/353.28
  6. Step 6: Final answer
    x = 400.39

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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.