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Finding the Fourth Proportional to 504.65, 696.65 and 318.23

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Solution

The fourth proportional to 504.65, 696.65 and 318.23 is: 439.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    504.65 : 696.65 = 318.23 : x
  2. Step 2: Convert to fraction form
    504.65/696.65 = 318.23/x
  3. Step 3: Cross multiply
    504.65x = 696.65 × 318.23
  4. Step 4: Simplify right side
    504.65x = 221,694.93
  5. Step 5: Solve for x
    x = 221,694.93/504.65
  6. Step 6: Final answer
    x = 439.30

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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.