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Finding the Fourth Proportional to 655.54, 904.50 and 393.71

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Solution

The fourth proportional to 655.54, 904.50 and 393.71 is: 543.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    655.54 : 904.50 = 393.71 : x
  2. Step 2: Convert to fraction form
    655.54/904.50 = 393.71/x
  3. Step 3: Cross multiply
    655.54x = 904.50 × 393.71
  4. Step 4: Simplify right side
    655.54x = 356,106.17
  5. Step 5: Solve for x
    x = 356,106.17/655.54
  6. Step 6: Final answer
    x = 543.23

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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.