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Finding the Fourth Proportional to 504.55, 696.04 and 317.95

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Solution

The fourth proportional to 504.55, 696.04 and 317.95 is: 438.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    504.55 : 696.04 = 317.95 : x
  2. Step 2: Convert to fraction form
    504.55/696.04 = 317.95/x
  3. Step 3: Cross multiply
    504.55x = 696.04 × 317.95
  4. Step 4: Simplify right side
    504.55x = 221,305.92
  5. Step 5: Solve for x
    x = 221,305.92/504.55
  6. Step 6: Final answer
    x = 438.62

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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.