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Finding the Fourth Proportional to 654.64, 974.69 and 651.40

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Solution

The fourth proportional to 654.64, 974.69 and 651.40 is: 969.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    654.64 : 974.69 = 651.40 : x
  2. Step 2: Convert to fraction form
    654.64/974.69 = 651.40/x
  3. Step 3: Cross multiply
    654.64x = 974.69 × 651.40
  4. Step 4: Simplify right side
    654.64x = 634,913.07
  5. Step 5: Solve for x
    x = 634,913.07/654.64
  6. Step 6: Final answer
    x = 969.87

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.