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Finding the Fourth Proportional to 918.53, 1,377.80 and 341.27

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Solution

The fourth proportional to 918.53, 1,377.80 and 341.27 is: 511.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    918.53 : 1,377.80 = 341.27 : x
  2. Step 2: Convert to fraction form
    918.53/1,377.80 = 341.27/x
  3. Step 3: Cross multiply
    918.53x = 1,377.80 × 341.27
  4. Step 4: Simplify right side
    918.53x = 470,200.10
  5. Step 5: Solve for x
    x = 470,200.10/918.53
  6. Step 6: Final answer
    x = 511.91

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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.