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Finding the Fourth Proportional to 612.14, 844.50 and 425.78

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Solution

The fourth proportional to 612.14, 844.50 and 425.78 is: 587.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.14 : 844.50 = 425.78 : x
  2. Step 2: Convert to fraction form
    612.14/844.50 = 425.78/x
  3. Step 3: Cross multiply
    612.14x = 844.50 × 425.78
  4. Step 4: Simplify right side
    612.14x = 359,566.99
  5. Step 5: Solve for x
    x = 359,566.99/612.14
  6. Step 6: Final answer
    x = 587.40

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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.