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Finding the Fourth Proportional to 612.50, 845.05 and 346.91

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Solution

The fourth proportional to 612.50, 845.05 and 346.91 is: 478.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.50 : 845.05 = 346.91 : x
  2. Step 2: Convert to fraction form
    612.50/845.05 = 346.91/x
  3. Step 3: Cross multiply
    612.50x = 845.05 × 346.91
  4. Step 4: Simplify right side
    612.50x = 293,157.54
  5. Step 5: Solve for x
    x = 293,157.54/612.50
  6. Step 6: Final answer
    x = 478.62

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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.