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Finding the Fourth Proportional to 585.45, 807.90 and 349.43

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Solution

The fourth proportional to 585.45, 807.90 and 349.43 is: 482.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    585.45 : 807.90 = 349.43 : x
  2. Step 2: Convert to fraction form
    585.45/807.90 = 349.43/x
  3. Step 3: Cross multiply
    585.45x = 807.90 × 349.43
  4. Step 4: Simplify right side
    585.45x = 282,306.39
  5. Step 5: Solve for x
    x = 282,306.39/585.45
  6. Step 6: Final answer
    x = 482.21

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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.