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Finding the Fourth Proportional to 645.24, 960.88 and 603.72

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Solution

The fourth proportional to 645.24, 960.88 and 603.72 is: 899.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    645.24 : 960.88 = 603.72 : x
  2. Step 2: Convert to fraction form
    645.24/960.88 = 603.72/x
  3. Step 3: Cross multiply
    645.24x = 960.88 × 603.72
  4. Step 4: Simplify right side
    645.24x = 580,102.47
  5. Step 5: Solve for x
    x = 580,102.47/645.24
  6. Step 6: Final answer
    x = 899.05

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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.