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Finding the Fourth Proportional to 353.95, 530.47 and 285.51

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Solution

The fourth proportional to 353.95, 530.47 and 285.51 is: 427.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    353.95 : 530.47 = 285.51 : x
  2. Step 2: Convert to fraction form
    353.95/530.47 = 285.51/x
  3. Step 3: Cross multiply
    353.95x = 530.47 × 285.51
  4. Step 4: Simplify right side
    353.95x = 151,454.49
  5. Step 5: Solve for x
    x = 151,454.49/353.95
  6. Step 6: Final answer
    x = 427.90

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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.