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Finding the Fourth Proportional to 864.32, 1,192.78 and 471.34

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Solution

The fourth proportional to 864.32, 1,192.78 and 471.34 is: 650.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    864.32 : 1,192.78 = 471.34 : x
  2. Step 2: Convert to fraction form
    864.32/1,192.78 = 471.34/x
  3. Step 3: Cross multiply
    864.32x = 1,192.78 × 471.34
  4. Step 4: Simplify right side
    864.32x = 562,197.64
  5. Step 5: Solve for x
    x = 562,197.64/864.32
  6. Step 6: Final answer
    x = 650.45

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Double scale
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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.