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Finding the Fourth Proportional to 553.79, 762.66 and 474.51

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Solution

The fourth proportional to 553.79, 762.66 and 474.51 is: 653.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    553.79 : 762.66 = 474.51 : x
  2. Step 2: Convert to fraction form
    553.79/762.66 = 474.51/x
  3. Step 3: Cross multiply
    553.79x = 762.66 × 474.51
  4. Step 4: Simplify right side
    553.79x = 361,889.80
  5. Step 5: Solve for x
    x = 361,889.80/553.79
  6. Step 6: Final answer
    x = 653.48

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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.