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Finding the Fourth Proportional to 508.04, 760.86 and 391.56

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Solution

The fourth proportional to 508.04, 760.86 and 391.56 is: 586.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    508.04 : 760.86 = 391.56 : x
  2. Step 2: Convert to fraction form
    508.04/760.86 = 391.56/x
  3. Step 3: Cross multiply
    508.04x = 760.86 × 391.56
  4. Step 4: Simplify right side
    508.04x = 297,922.34
  5. Step 5: Solve for x
    x = 297,922.34/508.04
  6. Step 6: Final answer
    x = 586.42

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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.