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Finding the Fourth Proportional to 968.64, 1,334.93 and 719.57

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Solution

The fourth proportional to 968.64, 1,334.93 and 719.57 is: 991.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    968.64 : 1,334.93 = 719.57 : x
  2. Step 2: Convert to fraction form
    968.64/1,334.93 = 719.57/x
  3. Step 3: Cross multiply
    968.64x = 1,334.93 × 719.57
  4. Step 4: Simplify right side
    968.64x = 960,565.31
  5. Step 5: Solve for x
    x = 960,565.31/968.64
  6. Step 6: Final answer
    x = 991.66

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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.