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Finding the Fourth Proportional to 612.90, 845.13 and 416.07

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Solution

The fourth proportional to 612.90, 845.13 and 416.07 is: 573.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.90 : 845.13 = 416.07 : x
  2. Step 2: Convert to fraction form
    612.90/845.13 = 416.07/x
  3. Step 3: Cross multiply
    612.90x = 845.13 × 416.07
  4. Step 4: Simplify right side
    612.90x = 351,633.24
  5. Step 5: Solve for x
    x = 351,633.24/612.90
  6. Step 6: Final answer
    x = 573.72

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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.