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Finding the Fourth Proportional to 1,044.63, 1,566.83 and 428.29

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Solution

The fourth proportional to 1,044.63, 1,566.83 and 428.29 is: 642.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,044.63 : 1,566.83 = 428.29 : x
  2. Step 2: Convert to fraction form
    1,044.63/1,566.83 = 428.29/x
  3. Step 3: Cross multiply
    1,044.63x = 1,566.83 × 428.29
  4. Step 4: Simplify right side
    1,044.63x = 671,054.77
  5. Step 5: Solve for x
    x = 671,054.77/1,044.63
  6. Step 6: Final answer
    x = 642.39

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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.