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Finding the Fourth Proportional to 355.42, 530.08 and 348.94

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Solution

The fourth proportional to 355.42, 530.08 and 348.94 is: 520.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    355.42 : 530.08 = 348.94 : x
  2. Step 2: Convert to fraction form
    355.42/530.08 = 348.94/x
  3. Step 3: Cross multiply
    355.42x = 530.08 × 348.94
  4. Step 4: Simplify right side
    355.42x = 184,965.91
  5. Step 5: Solve for x
    x = 184,965.91/355.42
  6. Step 6: Final answer
    x = 520.41

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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.