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Finding the Fourth Proportional to 653.94, 979.70 and 380.16

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Solution

The fourth proportional to 653.94, 979.70 and 380.16 is: 569.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    653.94 : 979.70 = 380.16 : x
  2. Step 2: Convert to fraction form
    653.94/979.70 = 380.16/x
  3. Step 3: Cross multiply
    653.94x = 979.70 × 380.16
  4. Step 4: Simplify right side
    653.94x = 372,440.85
  5. Step 5: Solve for x
    x = 372,440.85/653.94
  6. Step 6: Final answer
    x = 569.53

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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.