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Finding the Fourth Proportional to 999.56, 1,499.57 and 383.56

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Solution

The fourth proportional to 999.56, 1,499.57 and 383.56 is: 575.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    999.56 : 1,499.57 = 383.56 : x
  2. Step 2: Convert to fraction form
    999.56/1,499.57 = 383.56/x
  3. Step 3: Cross multiply
    999.56x = 1,499.57 × 383.56
  4. Step 4: Simplify right side
    999.56x = 575,170.84
  5. Step 5: Solve for x
    x = 575,170.84/999.56
  6. Step 6: Final answer
    x = 575.42

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1.5x scale

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.