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Finding the Fourth Proportional to 585.45, 808.70 and 487.71

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Solution

The fourth proportional to 585.45, 808.70 and 487.71 is: 673.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    585.45 : 808.70 = 487.71 : x
  2. Step 2: Convert to fraction form
    585.45/808.70 = 487.71/x
  3. Step 3: Cross multiply
    585.45x = 808.70 × 487.71
  4. Step 4: Simplify right side
    585.45x = 394,408.64
  5. Step 5: Solve for x
    x = 394,408.64/585.45
  6. Step 6: Final answer
    x = 673.68

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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.