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Finding the Fourth Proportional to 1,029.77, 1,420.52 and 656.09

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Solution

The fourth proportional to 1,029.77, 1,420.52 and 656.09 is: 905.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,029.77 : 1,420.52 = 656.09 : x
  2. Step 2: Convert to fraction form
    1,029.77/1,420.52 = 656.09/x
  3. Step 3: Cross multiply
    1,029.77x = 1,420.52 × 656.09
  4. Step 4: Simplify right side
    1,029.77x = 931,978.58
  5. Step 5: Solve for x
    x = 931,978.58/1,029.77
  6. Step 6: Final answer
    x = 905.04

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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.