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Finding the Fourth Proportional to 897.87, 1,239.08 and 504.89

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Solution

The fourth proportional to 897.87, 1,239.08 and 504.89 is: 696.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    897.87 : 1,239.08 = 504.89 : x
  2. Step 2: Convert to fraction form
    897.87/1,239.08 = 504.89/x
  3. Step 3: Cross multiply
    897.87x = 1,239.08 × 504.89
  4. Step 4: Simplify right side
    897.87x = 625,599.10
  5. Step 5: Solve for x
    x = 625,599.10/897.87
  6. Step 6: Final answer
    x = 696.76

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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.