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Finding the Fourth Proportional to 1,129.98, 1,560.63 and 1,114.62

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Solution

The fourth proportional to 1,129.98, 1,560.63 and 1,114.62 is: 1,539.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,129.98 : 1,560.63 = 1,114.62 : x
  2. Step 2: Convert to fraction form
    1,129.98/1,560.63 = 1,114.62/x
  3. Step 3: Cross multiply
    1,129.98x = 1,560.63 × 1,114.62
  4. Step 4: Simplify right side
    1,129.98x = 1,739,509.41
  5. Step 5: Solve for x
    x = 1,739,509.41/1,129.98
  6. Step 6: Final answer
    x = 1,539.42

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.