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Finding the Fourth Proportional to 507.65, 760.41 and 386.64

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Solution

The fourth proportional to 507.65, 760.41 and 386.64 is: 579.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    507.65 : 760.41 = 386.64 : x
  2. Step 2: Convert to fraction form
    507.65/760.41 = 386.64/x
  3. Step 3: Cross multiply
    507.65x = 760.41 × 386.64
  4. Step 4: Simplify right side
    507.65x = 294,004.92
  5. Step 5: Solve for x
    x = 294,004.92/507.65
  6. Step 6: Final answer
    x = 579.15

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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.