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Finding the Fourth Proportional to 653.12, 978.65 and 360.37

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Solution

The fourth proportional to 653.12, 978.65 and 360.37 is: 539.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    653.12 : 978.65 = 360.37 : x
  2. Step 2: Convert to fraction form
    653.12/978.65 = 360.37/x
  3. Step 3: Cross multiply
    653.12x = 978.65 × 360.37
  4. Step 4: Simplify right side
    653.12x = 352,676.10
  5. Step 5: Solve for x
    x = 352,676.10/653.12
  6. Step 6: Final answer
    x = 539.99

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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.