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Finding the Fourth Proportional to 655.63, 903.72 and 497.75

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Solution

The fourth proportional to 655.63, 903.72 and 497.75 is: 686.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    655.63 : 903.72 = 497.75 : x
  2. Step 2: Convert to fraction form
    655.63/903.72 = 497.75/x
  3. Step 3: Cross multiply
    655.63x = 903.72 × 497.75
  4. Step 4: Simplify right side
    655.63x = 449,826.63
  5. Step 5: Solve for x
    x = 449,826.63/655.63
  6. Step 6: Final answer
    x = 686.10

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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.