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Finding the Fourth Proportional to 612.68, 845.44 and 416.20

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Solution

The fourth proportional to 612.68, 845.44 and 416.20 is: 574.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.68 : 845.44 = 416.20 : x
  2. Step 2: Convert to fraction form
    612.68/845.44 = 416.20/x
  3. Step 3: Cross multiply
    612.68x = 845.44 × 416.20
  4. Step 4: Simplify right side
    612.68x = 351,872.13
  5. Step 5: Solve for x
    x = 351,872.13/612.68
  6. Step 6: Final answer
    x = 574.32

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1.5x scale

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.