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Finding the Fourth Proportional to 487.68, 727.50 and 454.56

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Solution

The fourth proportional to 487.68, 727.50 and 454.56 is: 678.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    487.68 : 727.50 = 454.56 : x
  2. Step 2: Convert to fraction form
    487.68/727.50 = 454.56/x
  3. Step 3: Cross multiply
    487.68x = 727.50 × 454.56
  4. Step 4: Simplify right side
    487.68x = 330,692.40
  5. Step 5: Solve for x
    x = 330,692.40/487.68
  6. Step 6: Final answer
    x = 678.09

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.