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Finding the Fourth Proportional to 647.46, 892.72 and 529.00

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Solution

The fourth proportional to 647.46, 892.72 and 529.00 is: 729.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    647.46 : 892.72 = 529.00 : x
  2. Step 2: Convert to fraction form
    647.46/892.72 = 529.00/x
  3. Step 3: Cross multiply
    647.46x = 892.72 × 529.00
  4. Step 4: Simplify right side
    647.46x = 472,247.31
  5. Step 5: Solve for x
    x = 472,247.31/647.46
  6. Step 6: Final answer
    x = 729.38

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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.