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Finding the Fourth Proportional to 603.88, 905.18 and 315.88

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Solution

The fourth proportional to 603.88, 905.18 and 315.88 is: 473.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    603.88 : 905.18 = 315.88 : x
  2. Step 2: Convert to fraction form
    603.88/905.18 = 315.88/x
  3. Step 3: Cross multiply
    603.88x = 905.18 × 315.88
  4. Step 4: Simplify right side
    603.88x = 285,928.26
  5. Step 5: Solve for x
    x = 285,928.26/603.88
  6. Step 6: Final answer
    x = 473.49

Related Problems

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Half scale
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Double scale
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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.