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Finding the Fourth Proportional to 659.60, 910.62 and 493.76

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Solution

The fourth proportional to 659.60, 910.62 and 493.76 is: 681.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    659.60 : 910.62 = 493.76 : x
  2. Step 2: Convert to fraction form
    659.60/910.62 = 493.76/x
  3. Step 3: Cross multiply
    659.60x = 910.62 × 493.76
  4. Step 4: Simplify right side
    659.60x = 449,620.71
  5. Step 5: Solve for x
    x = 449,620.71/659.60
  6. Step 6: Final answer
    x = 681.66

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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.