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Finding the Fourth Proportional to 612.94, 918.55 and 475.35

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Solution

The fourth proportional to 612.94, 918.55 and 475.35 is: 712.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.94 : 918.55 = 475.35 : x
  2. Step 2: Convert to fraction form
    612.94/918.55 = 475.35/x
  3. Step 3: Cross multiply
    612.94x = 918.55 × 475.35
  4. Step 4: Simplify right side
    612.94x = 436,629.26
  5. Step 5: Solve for x
    x = 436,629.26/612.94
  6. Step 6: Final answer
    x = 712.35

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.