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Finding the Fourth Proportional to 864.63, 1,193.21 and 471.65

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Solution

The fourth proportional to 864.63, 1,193.21 and 471.65 is: 650.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    864.63 : 1,193.21 = 471.65 : x
  2. Step 2: Convert to fraction form
    864.63/1,193.21 = 471.65/x
  3. Step 3: Cross multiply
    864.63x = 1,193.21 × 471.65
  4. Step 4: Simplify right side
    864.63x = 562,777.50
  5. Step 5: Solve for x
    x = 562,777.50/864.63
  6. Step 6: Final answer
    x = 650.89

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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.