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Finding the Fourth Proportional to 504.68, 696.28 and 318.12

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Solution

The fourth proportional to 504.68, 696.28 and 318.12 is: 438.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    504.68 : 696.28 = 318.12 : x
  2. Step 2: Convert to fraction form
    504.68/696.28 = 318.12/x
  3. Step 3: Cross multiply
    504.68x = 696.28 × 318.12
  4. Step 4: Simplify right side
    504.68x = 221,500.59
  5. Step 5: Solve for x
    x = 221,500.59/504.68
  6. Step 6: Final answer
    x = 438.89

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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.