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Finding the Fourth Proportional to 612.75, 845.55 and 347.19

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Solution

The fourth proportional to 612.75, 845.55 and 347.19 is: 479.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.75 : 845.55 = 347.19 : x
  2. Step 2: Convert to fraction form
    612.75/845.55 = 347.19/x
  3. Step 3: Cross multiply
    612.75x = 845.55 × 347.19
  4. Step 4: Simplify right side
    612.75x = 293,566.98
  5. Step 5: Solve for x
    x = 293,566.98/612.75
  6. Step 6: Final answer
    x = 479.10

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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.