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Finding the Fourth Proportional to 1,019.96, 1,529.92 and 403.31

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Solution

The fourth proportional to 1,019.96, 1,529.92 and 403.31 is: 604.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,019.96 : 1,529.92 = 403.31 : x
  2. Step 2: Convert to fraction form
    1,019.96/1,529.92 = 403.31/x
  3. Step 3: Cross multiply
    1,019.96x = 1,529.92 × 403.31
  4. Step 4: Simplify right side
    1,019.96x = 617,036.36
  5. Step 5: Solve for x
    x = 617,036.36/1,019.96
  6. Step 6: Final answer
    x = 604.96

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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.