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Finding the Fourth Proportional to 968.15, 1,336.30 and 653.47

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Solution

The fourth proportional to 968.15, 1,336.30 and 653.47 is: 901.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    968.15 : 1,336.30 = 653.47 : x
  2. Step 2: Convert to fraction form
    968.15/1,336.30 = 653.47/x
  3. Step 3: Cross multiply
    968.15x = 1,336.30 × 653.47
  4. Step 4: Simplify right side
    968.15x = 873,226.99
  5. Step 5: Solve for x
    x = 873,226.99/968.15
  6. Step 6: Final answer
    x = 901.95

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.