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Finding the Fourth Proportional to 379.50, 565.16 and 371.40

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Solution

The fourth proportional to 379.50, 565.16 and 371.40 is: 553.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    379.50 : 565.16 = 371.40 : x
  2. Step 2: Convert to fraction form
    379.50/565.16 = 371.40/x
  3. Step 3: Cross multiply
    379.50x = 565.16 × 371.40
  4. Step 4: Simplify right side
    379.50x = 209,900.42
  5. Step 5: Solve for x
    x = 209,900.42/379.50
  6. Step 6: Final answer
    x = 553.10

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.