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Finding the Fourth Proportional to 715.64, 987.23 and 450.41

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Solution

The fourth proportional to 715.64, 987.23 and 450.41 is: 621.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    715.64 : 987.23 = 450.41 : x
  2. Step 2: Convert to fraction form
    715.64/987.23 = 450.41/x
  3. Step 3: Cross multiply
    715.64x = 987.23 × 450.41
  4. Step 4: Simplify right side
    715.64x = 444,651.08
  5. Step 5: Solve for x
    x = 444,651.08/715.64
  6. Step 6: Final answer
    x = 621.34

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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.