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Finding the Fourth Proportional to 495.53, 683.45 and 320.57

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Solution

The fourth proportional to 495.53, 683.45 and 320.57 is: 442.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    495.53 : 683.45 = 320.57 : x
  2. Step 2: Convert to fraction form
    495.53/683.45 = 320.57/x
  3. Step 3: Cross multiply
    495.53x = 683.45 × 320.57
  4. Step 4: Simplify right side
    495.53x = 219,088.55
  5. Step 5: Solve for x
    x = 219,088.55/495.53
  6. Step 6: Final answer
    x = 442.13

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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.