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Finding the Fourth Proportional to 607.05, 911.36 and 315.16

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Solution

The fourth proportional to 607.05, 911.36 and 315.16 is: 473.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    607.05 : 911.36 = 315.16 : x
  2. Step 2: Convert to fraction form
    607.05/911.36 = 315.16/x
  3. Step 3: Cross multiply
    607.05x = 911.36 × 315.16
  4. Step 4: Simplify right side
    607.05x = 287,222.73
  5. Step 5: Solve for x
    x = 287,222.73/607.05
  6. Step 6: Final answer
    x = 473.15

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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.