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Finding the Fourth Proportional to 555.12, 828.70 and 482.22

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Solution

The fourth proportional to 555.12, 828.70 and 482.22 is: 719.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.12 : 828.70 = 482.22 : x
  2. Step 2: Convert to fraction form
    555.12/828.70 = 482.22/x
  3. Step 3: Cross multiply
    555.12x = 828.70 × 482.22
  4. Step 4: Simplify right side
    555.12x = 399,614.51
  5. Step 5: Solve for x
    x = 399,614.51/555.12
  6. Step 6: Final answer
    x = 719.87

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.