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Finding the Fourth Proportional to 356.87, 535.30 and 285.18

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Solution

The fourth proportional to 356.87, 535.30 and 285.18 is: 427.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    356.87 : 535.30 = 285.18 : x
  2. Step 2: Convert to fraction form
    356.87/535.30 = 285.18/x
  3. Step 3: Cross multiply
    356.87x = 535.30 × 285.18
  4. Step 4: Simplify right side
    356.87x = 152,656.14
  5. Step 5: Solve for x
    x = 152,656.14/356.87
  6. Step 6: Final answer
    x = 427.77

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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.