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Finding the Fourth Proportional to 646.45, 969.35 and 317.41

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Solution

The fourth proportional to 646.45, 969.35 and 317.41 is: 475.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    646.45 : 969.35 = 317.41 : x
  2. Step 2: Convert to fraction form
    646.45/969.35 = 317.41/x
  3. Step 3: Cross multiply
    646.45x = 969.35 × 317.41
  4. Step 4: Simplify right side
    646.45x = 307,681.38
  5. Step 5: Solve for x
    x = 307,681.38/646.45
  6. Step 6: Final answer
    x = 475.96

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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.