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Finding the Fourth Proportional to 354.08, 530.66 and 285.63

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Solution

The fourth proportional to 354.08, 530.66 and 285.63 is: 428.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    354.08 : 530.66 = 285.63 : x
  2. Step 2: Convert to fraction form
    354.08/530.66 = 285.63/x
  3. Step 3: Cross multiply
    354.08x = 530.66 × 285.63
  4. Step 4: Simplify right side
    354.08x = 151,572.42
  5. Step 5: Solve for x
    x = 151,572.42/354.08
  6. Step 6: Final answer
    x = 428.08

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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.