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Finding the Fourth Proportional to 696.72, 960.64 and 571.92

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Solution

The fourth proportional to 696.72, 960.64 and 571.92 is: 788.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    696.72 : 960.64 = 571.92 : x
  2. Step 2: Convert to fraction form
    696.72/960.64 = 571.92/x
  3. Step 3: Cross multiply
    696.72x = 960.64 × 571.92
  4. Step 4: Simplify right side
    696.72x = 549,409.23
  5. Step 5: Solve for x
    x = 549,409.23/696.72
  6. Step 6: Final answer
    x = 788.57

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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.