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Finding the Fourth Proportional to 1,125.37, 1,685.03 and 734.40

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Solution

The fourth proportional to 1,125.37, 1,685.03 and 734.40 is: 1,099.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,125.37 : 1,685.03 = 734.40 : x
  2. Step 2: Convert to fraction form
    1,125.37/1,685.03 = 734.40/x
  3. Step 3: Cross multiply
    1,125.37x = 1,685.03 × 734.40
  4. Step 4: Simplify right side
    1,125.37x = 1,237,482.36
  5. Step 5: Solve for x
    x = 1,237,482.36/1,125.37
  6. Step 6: Final answer
    x = 1,099.62

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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.