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Finding the Fourth Proportional to 476.72, 715.09 and 312.33

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Solution

The fourth proportional to 476.72, 715.09 and 312.33 is: 468.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    476.72 : 715.09 = 312.33 : x
  2. Step 2: Convert to fraction form
    476.72/715.09 = 312.33/x
  3. Step 3: Cross multiply
    476.72x = 715.09 × 312.33
  4. Step 4: Simplify right side
    476.72x = 223,343.88
  5. Step 5: Solve for x
    x = 223,343.88/476.72
  6. Step 6: Final answer
    x = 468.50

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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.