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Finding the Fourth Proportional to 653.41, 978.36 and 550.45

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Solution

The fourth proportional to 653.41, 978.36 and 550.45 is: 824.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    653.41 : 978.36 = 550.45 : x
  2. Step 2: Convert to fraction form
    653.41/978.36 = 550.45/x
  3. Step 3: Cross multiply
    653.41x = 978.36 × 550.45
  4. Step 4: Simplify right side
    653.41x = 538,538.26
  5. Step 5: Solve for x
    x = 538,538.26/653.41
  6. Step 6: Final answer
    x = 824.20

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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.