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Finding the Fourth Proportional to 509.59, 764.61 and 394.02

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Solution

The fourth proportional to 509.59, 764.61 and 394.02 is: 591.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    509.59 : 764.61 = 394.02 : x
  2. Step 2: Convert to fraction form
    509.59/764.61 = 394.02/x
  3. Step 3: Cross multiply
    509.59x = 764.61 × 394.02
  4. Step 4: Simplify right side
    509.59x = 301,271.63
  5. Step 5: Solve for x
    x = 301,271.63/509.59
  6. Step 6: Final answer
    x = 591.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.