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Finding the Fourth Proportional to 652.42, 978.08 and 446.48

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Solution

The fourth proportional to 652.42, 978.08 and 446.48 is: 669.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    652.42 : 978.08 = 446.48 : x
  2. Step 2: Convert to fraction form
    652.42/978.08 = 446.48/x
  3. Step 3: Cross multiply
    652.42x = 978.08 × 446.48
  4. Step 4: Simplify right side
    652.42x = 436,693.16
  5. Step 5: Solve for x
    x = 436,693.16/652.42
  6. Step 6: Final answer
    x = 669.34

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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.