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Finding the Fourth Proportional to 687.84, 949.05 and 454.92

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Solution

The fourth proportional to 687.84, 949.05 and 454.92 is: 627.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    687.84 : 949.05 = 454.92 : x
  2. Step 2: Convert to fraction form
    687.84/949.05 = 454.92/x
  3. Step 3: Cross multiply
    687.84x = 949.05 × 454.92
  4. Step 4: Simplify right side
    687.84x = 431,741.83
  5. Step 5: Solve for x
    x = 431,741.83/687.84
  6. Step 6: Final answer
    x = 627.68

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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.