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Finding the Fourth Proportional to 1,113.84, 1,670.92 and 383.44

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Solution

The fourth proportional to 1,113.84, 1,670.92 and 383.44 is: 575.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,113.84 : 1,670.92 = 383.44 : x
  2. Step 2: Convert to fraction form
    1,113.84/1,670.92 = 383.44/x
  3. Step 3: Cross multiply
    1,113.84x = 1,670.92 × 383.44
  4. Step 4: Simplify right side
    1,113.84x = 640,697.56
  5. Step 5: Solve for x
    x = 640,697.56/1,113.84
  6. Step 6: Final answer
    x = 575.22

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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.