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Finding the Fourth Proportional to 553.41, 763.66 and 317.35

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Solution

The fourth proportional to 553.41, 763.66 and 317.35 is: 437.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    553.41 : 763.66 = 317.35 : x
  2. Step 2: Convert to fraction form
    553.41/763.66 = 317.35/x
  3. Step 3: Cross multiply
    553.41x = 763.66 × 317.35
  4. Step 4: Simplify right side
    553.41x = 242,348.85
  5. Step 5: Solve for x
    x = 242,348.85/553.41
  6. Step 6: Final answer
    x = 437.92

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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.