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Finding the Fourth Proportional to 897.78, 1,239 and 504.94

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Solution

The fourth proportional to 897.78, 1,239 and 504.94 is: 696.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    897.78 : 1,239 = 504.94 : x
  2. Step 2: Convert to fraction form
    897.78/1,239 = 504.94/x
  3. Step 3: Cross multiply
    897.78x = 1,239 × 504.94
  4. Step 4: Simplify right side
    897.78x = 625,620.66
  5. Step 5: Solve for x
    x = 625,620.66/897.78
  6. Step 6: Final answer
    x = 696.85

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1.5x scale

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.