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Finding the Fourth Proportional to 655.55, 904.79 and 375.83

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Solution

The fourth proportional to 655.55, 904.79 and 375.83 is: 518.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    655.55 : 904.79 = 375.83 : x
  2. Step 2: Convert to fraction form
    655.55/904.79 = 375.83/x
  3. Step 3: Cross multiply
    655.55x = 904.79 × 375.83
  4. Step 4: Simplify right side
    655.55x = 340,043.64
  5. Step 5: Solve for x
    x = 340,043.64/655.55
  6. Step 6: Final answer
    x = 518.72

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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.