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Finding the Fourth Proportional to 612.49, 846.39 and 464.86

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Solution

The fourth proportional to 612.49, 846.39 and 464.86 is: 642.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.49 : 846.39 = 464.86 : x
  2. Step 2: Convert to fraction form
    612.49/846.39 = 464.86/x
  3. Step 3: Cross multiply
    612.49x = 846.39 × 464.86
  4. Step 4: Simplify right side
    612.49x = 393,452.86
  5. Step 5: Solve for x
    x = 393,452.86/612.49
  6. Step 6: Final answer
    x = 642.38

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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.