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Finding the Fourth Proportional to 555.05, 831.09 and 310.88

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Solution

The fourth proportional to 555.05, 831.09 and 310.88 is: 465.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.05 : 831.09 = 310.88 : x
  2. Step 2: Convert to fraction form
    555.05/831.09 = 310.88/x
  3. Step 3: Cross multiply
    555.05x = 831.09 × 310.88
  4. Step 4: Simplify right side
    555.05x = 258,369.26
  5. Step 5: Solve for x
    x = 258,369.26/555.05
  6. Step 6: Final answer
    x = 465.49

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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.