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Finding the Fourth Proportional to 1,969.35, 2,953.79 and 508.61

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Solution

The fourth proportional to 1,969.35, 2,953.79 and 508.61 is: 762.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,969.35 : 2,953.79 = 508.61 : x
  2. Step 2: Convert to fraction form
    1,969.35/2,953.79 = 508.61/x
  3. Step 3: Cross multiply
    1,969.35x = 2,953.79 × 508.61
  4. Step 4: Simplify right side
    1,969.35x = 1,502,309.82
  5. Step 5: Solve for x
    x = 1,502,309.82/1,969.35
  6. Step 6: Final answer
    x = 762.85

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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.