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Finding the Fourth Proportional to 355.37, 530.19 and 316.38

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Solution

The fourth proportional to 355.37, 530.19 and 316.38 is: 472.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    355.37 : 530.19 = 316.38 : x
  2. Step 2: Convert to fraction form
    355.37/530.19 = 316.38/x
  3. Step 3: Cross multiply
    355.37x = 530.19 × 316.38
  4. Step 4: Simplify right side
    355.37x = 167,741.51
  5. Step 5: Solve for x
    x = 167,741.51/355.37
  6. Step 6: Final answer
    x = 472.03

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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.