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Finding the Fourth Proportional to 761.66, 1,051.11 and 467.09

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Solution

The fourth proportional to 761.66, 1,051.11 and 467.09 is: 644.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    761.66 : 1,051.11 = 467.09 : x
  2. Step 2: Convert to fraction form
    761.66/1,051.11 = 467.09/x
  3. Step 3: Cross multiply
    761.66x = 1,051.11 × 467.09
  4. Step 4: Simplify right side
    761.66x = 490,962.97
  5. Step 5: Solve for x
    x = 490,962.97/761.66
  6. Step 6: Final answer
    x = 644.60

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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.