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Finding the Fourth Proportional to 1,672.93, 2,509.53 and 518.68

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Solution

The fourth proportional to 1,672.93, 2,509.53 and 518.68 is: 778.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,672.93 : 2,509.53 = 518.68 : x
  2. Step 2: Convert to fraction form
    1,672.93/2,509.53 = 518.68/x
  3. Step 3: Cross multiply
    1,672.93x = 2,509.53 × 518.68
  4. Step 4: Simplify right side
    1,672.93x = 1,301,643.02
  5. Step 5: Solve for x
    x = 1,301,643.02/1,672.93
  6. Step 6: Final answer
    x = 778.06

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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.