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Finding the Fourth Proportional to 743.65, 1,025.40 and 633.49

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Solution

The fourth proportional to 743.65, 1,025.40 and 633.49 is: 873.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    743.65 : 1,025.40 = 633.49 : x
  2. Step 2: Convert to fraction form
    743.65/1,025.40 = 633.49/x
  3. Step 3: Cross multiply
    743.65x = 1,025.40 × 633.49
  4. Step 4: Simplify right side
    743.65x = 649,580.65
  5. Step 5: Solve for x
    x = 649,580.65/743.65
  6. Step 6: Final answer
    x = 873.50

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.