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Finding the Fourth Proportional to 968.60, 1,336.88 and 637.06

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Solution

The fourth proportional to 968.60, 1,336.88 and 637.06 is: 879.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    968.60 : 1,336.88 = 637.06 : x
  2. Step 2: Convert to fraction form
    968.60/1,336.88 = 637.06/x
  3. Step 3: Cross multiply
    968.60x = 1,336.88 × 637.06
  4. Step 4: Simplify right side
    968.60x = 851,666.25
  5. Step 5: Solve for x
    x = 851,666.25/968.60
  6. Step 6: Final answer
    x = 879.27

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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.