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Finding the Fourth Proportional to 1,649.33, 2,475 and 858.77

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Solution

The fourth proportional to 1,649.33, 2,475 and 858.77 is: 1,288.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,649.33 : 2,475 = 858.77 : x
  2. Step 2: Convert to fraction form
    1,649.33/2,475 = 858.77/x
  3. Step 3: Cross multiply
    1,649.33x = 2,475 × 858.77
  4. Step 4: Simplify right side
    1,649.33x = 2,125,455.75
  5. Step 5: Solve for x
    x = 2,125,455.75/1,649.33
  6. Step 6: Final answer
    x = 1,288.68

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.