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Finding the Fourth Proportional to 716.88, 988.75 and 480.76

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Solution

The fourth proportional to 716.88, 988.75 and 480.76 is: 663.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    716.88 : 988.75 = 480.76 : x
  2. Step 2: Convert to fraction form
    716.88/988.75 = 480.76/x
  3. Step 3: Cross multiply
    716.88x = 988.75 × 480.76
  4. Step 4: Simplify right side
    716.88x = 475,349.58
  5. Step 5: Solve for x
    x = 475,349.58/716.88
  6. Step 6: Final answer
    x = 663.08

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Half scale
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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.