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Finding the Fourth Proportional to 653.50, 979.02 and 378.75

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Solution

The fourth proportional to 653.50, 979.02 and 378.75 is: 567.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    653.50 : 979.02 = 378.75 : x
  2. Step 2: Convert to fraction form
    653.50/979.02 = 378.75/x
  3. Step 3: Cross multiply
    653.50x = 979.02 × 378.75
  4. Step 4: Simplify right side
    653.50x = 370,803.83
  5. Step 5: Solve for x
    x = 370,803.83/653.50
  6. Step 6: Final answer
    x = 567.41

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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.