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Finding the Fourth Proportional to 687.88, 948.64 and 467.16

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Solution

The fourth proportional to 687.88, 948.64 and 467.16 is: 644.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    687.88 : 948.64 = 467.16 : x
  2. Step 2: Convert to fraction form
    687.88/948.64 = 467.16/x
  3. Step 3: Cross multiply
    687.88x = 948.64 × 467.16
  4. Step 4: Simplify right side
    687.88x = 443,166.66
  5. Step 5: Solve for x
    x = 443,166.66/687.88
  6. Step 6: Final answer
    x = 644.25

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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.