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Finding the Fourth Proportional to 355.06, 530.06 and 318.34

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Solution

The fourth proportional to 355.06, 530.06 and 318.34 is: 475.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    355.06 : 530.06 = 318.34 : x
  2. Step 2: Convert to fraction form
    355.06/530.06 = 318.34/x
  3. Step 3: Cross multiply
    355.06x = 530.06 × 318.34
  4. Step 4: Simplify right side
    355.06x = 168,739.30
  5. Step 5: Solve for x
    x = 168,739.30/355.06
  6. Step 6: Final answer
    x = 475.24

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.