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Finding the Fourth Proportional to 612.80, 844.80 and 437.60

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Solution

The fourth proportional to 612.80, 844.80 and 437.60 is: 603.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.80 : 844.80 = 437.60 : x
  2. Step 2: Convert to fraction form
    612.80/844.80 = 437.60/x
  3. Step 3: Cross multiply
    612.80x = 844.80 × 437.60
  4. Step 4: Simplify right side
    612.80x = 369,684.48
  5. Step 5: Solve for x
    x = 369,684.48/612.80
  6. Step 6: Final answer
    x = 603.27

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.