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Finding the Fourth Proportional to 968.77, 1,336.78 and 654.72

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Solution

The fourth proportional to 968.77, 1,336.78 and 654.72 is: 903.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    968.77 : 1,336.78 = 654.72 : x
  2. Step 2: Convert to fraction form
    968.77/1,336.78 = 654.72/x
  3. Step 3: Cross multiply
    968.77x = 1,336.78 × 654.72
  4. Step 4: Simplify right side
    968.77x = 875,216.14
  5. Step 5: Solve for x
    x = 875,216.14/968.77
  6. Step 6: Final answer
    x = 903.43

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Double scale
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1.5x scale

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.