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Finding the Fourth Proportional to 646.95, 969.50 and 317.64

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Solution

The fourth proportional to 646.95, 969.50 and 317.64 is: 476.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    646.95 : 969.50 = 317.64 : x
  2. Step 2: Convert to fraction form
    646.95/969.50 = 317.64/x
  3. Step 3: Cross multiply
    646.95x = 969.50 × 317.64
  4. Step 4: Simplify right side
    646.95x = 307,950.96
  5. Step 5: Solve for x
    x = 307,950.96/646.95
  6. Step 6: Final answer
    x = 476.00

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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.