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Finding the Fourth Proportional to 1,539.67, 2,309.51 and 718.18

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Solution

The fourth proportional to 1,539.67, 2,309.51 and 718.18 is: 1,077.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,539.67 : 2,309.51 = 718.18 : x
  2. Step 2: Convert to fraction form
    1,539.67/2,309.51 = 718.18/x
  3. Step 3: Cross multiply
    1,539.67x = 2,309.51 × 718.18
  4. Step 4: Simplify right side
    1,539.67x = 1,658,643.89
  5. Step 5: Solve for x
    x = 1,658,643.89/1,539.67
  6. Step 6: Final answer
    x = 1,077.27

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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.