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Finding the Fourth Proportional to 369.88, 553.98 and 317.23

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Solution

The fourth proportional to 369.88, 553.98 and 317.23 is: 475.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    369.88 : 553.98 = 317.23 : x
  2. Step 2: Convert to fraction form
    369.88/553.98 = 317.23/x
  3. Step 3: Cross multiply
    369.88x = 553.98 × 317.23
  4. Step 4: Simplify right side
    369.88x = 175,741.10
  5. Step 5: Solve for x
    x = 175,741.10/369.88
  6. Step 6: Final answer
    x = 475.13

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.