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Finding the Fourth Proportional to 687.02, 948.24 and 462.98

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Solution

The fourth proportional to 687.02, 948.24 and 462.98 is: 639.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    687.02 : 948.24 = 462.98 : x
  2. Step 2: Convert to fraction form
    687.02/948.24 = 462.98/x
  3. Step 3: Cross multiply
    687.02x = 948.24 × 462.98
  4. Step 4: Simplify right side
    687.02x = 439,011.41
  5. Step 5: Solve for x
    x = 439,011.41/687.02
  6. Step 6: Final answer
    x = 639.01

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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.