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Finding the Fourth Proportional to 1,154.55, 1,734.21 and 693.21

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Solution

The fourth proportional to 1,154.55, 1,734.21 and 693.21 is: 1,041.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,154.55 : 1,734.21 = 693.21 : x
  2. Step 2: Convert to fraction form
    1,154.55/1,734.21 = 693.21/x
  3. Step 3: Cross multiply
    1,154.55x = 1,734.21 × 693.21
  4. Step 4: Simplify right side
    1,154.55x = 1,202,171.71
  5. Step 5: Solve for x
    x = 1,202,171.71/1,154.55
  6. Step 6: Final answer
    x = 1,041.25

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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.