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Finding the Fourth Proportional to 612.60, 919.16 and 448.22

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Solution

The fourth proportional to 612.60, 919.16 and 448.22 is: 672.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.60 : 919.16 = 448.22 : x
  2. Step 2: Convert to fraction form
    612.60/919.16 = 448.22/x
  3. Step 3: Cross multiply
    612.60x = 919.16 × 448.22
  4. Step 4: Simplify right side
    612.60x = 411,985.90
  5. Step 5: Solve for x
    x = 411,985.90/612.60
  6. Step 6: Final answer
    x = 672.52

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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.