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Finding the Fourth Proportional to 667.68, 921.27 and 501.54

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Solution

The fourth proportional to 667.68, 921.27 and 501.54 is: 692.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    667.68 : 921.27 = 501.54 : x
  2. Step 2: Convert to fraction form
    667.68/921.27 = 501.54/x
  3. Step 3: Cross multiply
    667.68x = 921.27 × 501.54
  4. Step 4: Simplify right side
    667.68x = 462,053.76
  5. Step 5: Solve for x
    x = 462,053.76/667.68
  6. Step 6: Final answer
    x = 692.03

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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.