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Finding the Fourth Proportional to 746.61, 1,119.63 and 259.53

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Solution

The fourth proportional to 746.61, 1,119.63 and 259.53 is: 389.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    746.61 : 1,119.63 = 259.53 : x
  2. Step 2: Convert to fraction form
    746.61/1,119.63 = 259.53/x
  3. Step 3: Cross multiply
    746.61x = 1,119.63 × 259.53
  4. Step 4: Simplify right side
    746.61x = 290,577.57
  5. Step 5: Solve for x
    x = 290,577.57/746.61
  6. Step 6: Final answer
    x = 389.20

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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.