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Finding the Fourth Proportional to 612.99, 845.85 and 347.40

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Solution

The fourth proportional to 612.99, 845.85 and 347.40 is: 479.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.99 : 845.85 = 347.40 : x
  2. Step 2: Convert to fraction form
    612.99/845.85 = 347.40/x
  3. Step 3: Cross multiply
    612.99x = 845.85 × 347.40
  4. Step 4: Simplify right side
    612.99x = 293,848.29
  5. Step 5: Solve for x
    x = 293,848.29/612.99
  6. Step 6: Final answer
    x = 479.37

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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.