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Finding the Fourth Proportional to 603.56, 904.99 and 321.78

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Solution

The fourth proportional to 603.56, 904.99 and 321.78 is: 482.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    603.56 : 904.99 = 321.78 : x
  2. Step 2: Convert to fraction form
    603.56/904.99 = 321.78/x
  3. Step 3: Cross multiply
    603.56x = 904.99 × 321.78
  4. Step 4: Simplify right side
    603.56x = 291,206.24
  5. Step 5: Solve for x
    x = 291,206.24/603.56
  6. Step 6: Final answer
    x = 482.48

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Similar ratio
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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.