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Finding the Fourth Proportional to 771.47, 1,064.37 and 456.84

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Solution

The fourth proportional to 771.47, 1,064.37 and 456.84 is: 630.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    771.47 : 1,064.37 = 456.84 : x
  2. Step 2: Convert to fraction form
    771.47/1,064.37 = 456.84/x
  3. Step 3: Cross multiply
    771.47x = 1,064.37 × 456.84
  4. Step 4: Simplify right side
    771.47x = 486,247.54
  5. Step 5: Solve for x
    x = 486,247.54/771.47
  6. Step 6: Final answer
    x = 630.28

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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.