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Finding the Fourth Proportional to 612.92, 916.74 and 448.49

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Solution

The fourth proportional to 612.92, 916.74 and 448.49 is: 670.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.92 : 916.74 = 448.49 : x
  2. Step 2: Convert to fraction form
    612.92/916.74 = 448.49/x
  3. Step 3: Cross multiply
    612.92x = 916.74 × 448.49
  4. Step 4: Simplify right side
    612.92x = 411,144.14
  5. Step 5: Solve for x
    x = 411,144.14/612.92
  6. Step 6: Final answer
    x = 670.80

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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.