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Finding the Fourth Proportional to 612.30, 917.55 and 246.45

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Solution

The fourth proportional to 612.30, 917.55 and 246.45 is: 369.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.30 : 917.55 = 246.45 : x
  2. Step 2: Convert to fraction form
    612.30/917.55 = 246.45/x
  3. Step 3: Cross multiply
    612.30x = 917.55 × 246.45
  4. Step 4: Simplify right side
    612.30x = 226,130.20
  5. Step 5: Solve for x
    x = 226,130.20/612.30
  6. Step 6: Final answer
    x = 369.31

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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.