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Finding the Fourth Proportional to 1,063.37, 1,594.46 and 405.21

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Solution

The fourth proportional to 1,063.37, 1,594.46 and 405.21 is: 607.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,063.37 : 1,594.46 = 405.21 : x
  2. Step 2: Convert to fraction form
    1,063.37/1,594.46 = 405.21/x
  3. Step 3: Cross multiply
    1,063.37x = 1,594.46 × 405.21
  4. Step 4: Simplify right side
    1,063.37x = 646,089.11
  5. Step 5: Solve for x
    x = 646,089.11/1,063.37
  6. Step 6: Final answer
    x = 607.59

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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.