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Finding the Fourth Proportional to 749.34, 1,124.29 and 359.51

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Solution

The fourth proportional to 749.34, 1,124.29 and 359.51 is: 539.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    749.34 : 1,124.29 = 359.51 : x
  2. Step 2: Convert to fraction form
    749.34/1,124.29 = 359.51/x
  3. Step 3: Cross multiply
    749.34x = 1,124.29 × 359.51
  4. Step 4: Simplify right side
    749.34x = 404,193.50
  5. Step 5: Solve for x
    x = 404,193.50/749.34
  6. Step 6: Final answer
    x = 539.40

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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.