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Finding the Fourth Proportional to 1,029.94, 1,421.33 and 564.19

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Solution

The fourth proportional to 1,029.94, 1,421.33 and 564.19 is: 778.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,029.94 : 1,421.33 = 564.19 : x
  2. Step 2: Convert to fraction form
    1,029.94/1,421.33 = 564.19/x
  3. Step 3: Cross multiply
    1,029.94x = 1,421.33 × 564.19
  4. Step 4: Simplify right side
    1,029.94x = 801,893.80
  5. Step 5: Solve for x
    x = 801,893.80/1,029.94
  6. Step 6: Final answer
    x = 778.58

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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.