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Finding the Fourth Proportional to 504.65, 696.68 and 315.65

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Solution

The fourth proportional to 504.65, 696.68 and 315.65 is: 435.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    504.65 : 696.68 = 315.65 : x
  2. Step 2: Convert to fraction form
    504.65/696.68 = 315.65/x
  3. Step 3: Cross multiply
    504.65x = 696.68 × 315.65
  4. Step 4: Simplify right side
    504.65x = 219,907.04
  5. Step 5: Solve for x
    x = 219,907.04/504.65
  6. Step 6: Final answer
    x = 435.76

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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.