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Finding the Fourth Proportional to 1,020.46, 1,529.83 and 404.60

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Solution

The fourth proportional to 1,020.46, 1,529.83 and 404.60 is: 606.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,020.46 : 1,529.83 = 404.60 : x
  2. Step 2: Convert to fraction form
    1,020.46/1,529.83 = 404.60/x
  3. Step 3: Cross multiply
    1,020.46x = 1,529.83 × 404.60
  4. Step 4: Simplify right side
    1,020.46x = 618,967.20
  5. Step 5: Solve for x
    x = 618,967.20/1,020.46
  6. Step 6: Final answer
    x = 606.56

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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.