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Finding the Fourth Proportional to 477.80, 715.74 and 380.46

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Solution

The fourth proportional to 477.80, 715.74 and 380.46 is: 569.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    477.80 : 715.74 = 380.46 : x
  2. Step 2: Convert to fraction form
    477.80/715.74 = 380.46/x
  3. Step 3: Cross multiply
    477.80x = 715.74 × 380.46
  4. Step 4: Simplify right side
    477.80x = 272,310.44
  5. Step 5: Solve for x
    x = 272,310.44/477.80
  6. Step 6: Final answer
    x = 569.93

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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.