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Finding the Fourth Proportional to 651.28, 899.04 and 511.78

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Solution

The fourth proportional to 651.28, 899.04 and 511.78 is: 706.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    651.28 : 899.04 = 511.78 : x
  2. Step 2: Convert to fraction form
    651.28/899.04 = 511.78/x
  3. Step 3: Cross multiply
    651.28x = 899.04 × 511.78
  4. Step 4: Simplify right side
    651.28x = 460,110.69
  5. Step 5: Solve for x
    x = 460,110.69/651.28
  6. Step 6: Final answer
    x = 706.47

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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.