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Finding the Fourth Proportional to 653.76, 978.12 and 437.04

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Solution

The fourth proportional to 653.76, 978.12 and 437.04 is: 653.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    653.76 : 978.12 = 437.04 : x
  2. Step 2: Convert to fraction form
    653.76/978.12 = 437.04/x
  3. Step 3: Cross multiply
    653.76x = 978.12 × 437.04
  4. Step 4: Simplify right side
    653.76x = 427,477.56
  5. Step 5: Solve for x
    x = 427,477.56/653.76
  6. Step 6: Final answer
    x = 653.88

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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.