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Finding the Fourth Proportional to 1,003.80, 1,384.68 and 610.77

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Solution

The fourth proportional to 1,003.80, 1,384.68 and 610.77 is: 842.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,003.80 : 1,384.68 = 610.77 : x
  2. Step 2: Convert to fraction form
    1,003.80/1,384.68 = 610.77/x
  3. Step 3: Cross multiply
    1,003.80x = 1,384.68 × 610.77
  4. Step 4: Simplify right side
    1,003.80x = 845,721.00
  5. Step 5: Solve for x
    x = 845,721.00/1,003.80
  6. Step 6: Final answer
    x = 842.52

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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.