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Finding the Fourth Proportional to 687.53, 948.77 and 377.03

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Solution

The fourth proportional to 687.53, 948.77 and 377.03 is: 520.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    687.53 : 948.77 = 377.03 : x
  2. Step 2: Convert to fraction form
    687.53/948.77 = 377.03/x
  3. Step 3: Cross multiply
    687.53x = 948.77 × 377.03
  4. Step 4: Simplify right side
    687.53x = 357,712.87
  5. Step 5: Solve for x
    x = 357,712.87/687.53
  6. Step 6: Final answer
    x = 520.29

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Double scale
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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.