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Finding the Fourth Proportional to 655.72, 904.63 and 375.90

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Solution

The fourth proportional to 655.72, 904.63 and 375.90 is: 518.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    655.72 : 904.63 = 375.90 : x
  2. Step 2: Convert to fraction form
    655.72/904.63 = 375.90/x
  3. Step 3: Cross multiply
    655.72x = 904.63 × 375.90
  4. Step 4: Simplify right side
    655.72x = 340,050.42
  5. Step 5: Solve for x
    x = 340,050.42/655.72
  6. Step 6: Final answer
    x = 518.59

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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.