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Finding the Fourth Proportional to 571.55, 788.76 and 322.88

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Solution

The fourth proportional to 571.55, 788.76 and 322.88 is: 445.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    571.55 : 788.76 = 322.88 : x
  2. Step 2: Convert to fraction form
    571.55/788.76 = 322.88/x
  3. Step 3: Cross multiply
    571.55x = 788.76 × 322.88
  4. Step 4: Simplify right side
    571.55x = 254,670.89
  5. Step 5: Solve for x
    x = 254,670.89/571.55
  6. Step 6: Final answer
    x = 445.58

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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.