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Finding the Fourth Proportional to 717.82, 990.48 and 482.17

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Solution

The fourth proportional to 717.82, 990.48 and 482.17 is: 665.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    717.82 : 990.48 = 482.17 : x
  2. Step 2: Convert to fraction form
    717.82/990.48 = 482.17/x
  3. Step 3: Cross multiply
    717.82x = 990.48 × 482.17
  4. Step 4: Simplify right side
    717.82x = 477,579.74
  5. Step 5: Solve for x
    x = 477,579.74/717.82
  6. Step 6: Final answer
    x = 665.32

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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.