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Finding the Fourth Proportional to 753.21, 1,129.83 and 624.69

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Solution

The fourth proportional to 753.21, 1,129.83 and 624.69 is: 937.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    753.21 : 1,129.83 = 624.69 : x
  2. Step 2: Convert to fraction form
    753.21/1,129.83 = 624.69/x
  3. Step 3: Cross multiply
    753.21x = 1,129.83 × 624.69
  4. Step 4: Simplify right side
    753.21x = 705,793.50
  5. Step 5: Solve for x
    x = 705,793.50/753.21
  6. Step 6: Final answer
    x = 937.05

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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.