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Finding the Fourth Proportional to 761.89, 1,051.21 and 467.05

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Solution

The fourth proportional to 761.89, 1,051.21 and 467.05 is: 644.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    761.89 : 1,051.21 = 467.05 : x
  2. Step 2: Convert to fraction form
    761.89/1,051.21 = 467.05/x
  3. Step 3: Cross multiply
    761.89x = 1,051.21 × 467.05
  4. Step 4: Simplify right side
    761.89x = 490,967.63
  5. Step 5: Solve for x
    x = 490,967.63/761.89
  6. Step 6: Final answer
    x = 644.41

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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.