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Finding the Fourth Proportional to 864.21, 1,192.61 and 471.24

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Solution

The fourth proportional to 864.21, 1,192.61 and 471.24 is: 650.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    864.21 : 1,192.61 = 471.24 : x
  2. Step 2: Convert to fraction form
    864.21/1,192.61 = 471.24/x
  3. Step 3: Cross multiply
    864.21x = 1,192.61 × 471.24
  4. Step 4: Simplify right side
    864.21x = 562,005.54
  5. Step 5: Solve for x
    x = 562,005.54/864.21
  6. Step 6: Final answer
    x = 650.31

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1.5x scale

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.