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Finding the Fourth Proportional to 749.84, 1,124.39 and 453.66

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Solution

The fourth proportional to 749.84, 1,124.39 and 453.66 is: 680.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    749.84 : 1,124.39 = 453.66 : x
  2. Step 2: Convert to fraction form
    749.84/1,124.39 = 453.66/x
  3. Step 3: Cross multiply
    749.84x = 1,124.39 × 453.66
  4. Step 4: Simplify right side
    749.84x = 510,090.77
  5. Step 5: Solve for x
    x = 510,090.77/749.84
  6. Step 6: Final answer
    x = 680.27

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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.