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Finding the Fourth Proportional to 648.68, 973.92 and 404.48

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Solution

The fourth proportional to 648.68, 973.92 and 404.48 is: 607.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    648.68 : 973.92 = 404.48 : x
  2. Step 2: Convert to fraction form
    648.68/973.92 = 404.48/x
  3. Step 3: Cross multiply
    648.68x = 973.92 × 404.48
  4. Step 4: Simplify right side
    648.68x = 393,931.16
  5. Step 5: Solve for x
    x = 393,931.16/648.68
  6. Step 6: Final answer
    x = 607.28

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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.