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Finding the Fourth Proportional to 882.60, 1,329 and 786

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Solution

The fourth proportional to 882.60, 1,329 and 786 is: 1,183.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    882.60 : 1,329 = 786 : x
  2. Step 2: Convert to fraction form
    882.60/1,329 = 786/x
  3. Step 3: Cross multiply
    882.60x = 1,329 × 786
  4. Step 4: Simplify right side
    882.60x = 1,044,594
  5. Step 5: Solve for x
    x = 1,044,594/882.60
  6. Step 6: Final answer
    x = 1,183.54

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.