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Finding the Fourth Proportional to 655.72, 979.26 and 525.91

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Solution

The fourth proportional to 655.72, 979.26 and 525.91 is: 785.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    655.72 : 979.26 = 525.91 : x
  2. Step 2: Convert to fraction form
    655.72/979.26 = 525.91/x
  3. Step 3: Cross multiply
    655.72x = 979.26 × 525.91
  4. Step 4: Simplify right side
    655.72x = 515,002.63
  5. Step 5: Solve for x
    x = 515,002.63/655.72
  6. Step 6: Final answer
    x = 785.40

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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.