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Finding the Fourth Proportional to 715.75, 988.14 and 483.28

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Solution

The fourth proportional to 715.75, 988.14 and 483.28 is: 667.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    715.75 : 988.14 = 483.28 : x
  2. Step 2: Convert to fraction form
    715.75/988.14 = 483.28/x
  3. Step 3: Cross multiply
    715.75x = 988.14 × 483.28
  4. Step 4: Simplify right side
    715.75x = 477,548.30
  5. Step 5: Solve for x
    x = 477,548.30/715.75
  6. Step 6: Final answer
    x = 667.20

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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.