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Finding the Fourth Proportional to 612.90, 845.78 and 364.07

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Solution

The fourth proportional to 612.90, 845.78 and 364.07 is: 502.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.90 : 845.78 = 364.07 : x
  2. Step 2: Convert to fraction form
    612.90/845.78 = 364.07/x
  3. Step 3: Cross multiply
    612.90x = 845.78 × 364.07
  4. Step 4: Simplify right side
    612.90x = 307,923.42
  5. Step 5: Solve for x
    x = 307,923.42/612.90
  6. Step 6: Final answer
    x = 502.40

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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.