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Finding the Fourth Proportional to 1,673.06, 2,509.47 and 518.78

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Solution

The fourth proportional to 1,673.06, 2,509.47 and 518.78 is: 778.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,673.06 : 2,509.47 = 518.78 : x
  2. Step 2: Convert to fraction form
    1,673.06/2,509.47 = 518.78/x
  3. Step 3: Cross multiply
    1,673.06x = 2,509.47 × 518.78
  4. Step 4: Simplify right side
    1,673.06x = 1,301,862.85
  5. Step 5: Solve for x
    x = 1,301,862.85/1,673.06
  6. Step 6: Final answer
    x = 778.13

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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.