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Finding the Fourth Proportional to 612.07, 917.70 and 246.40

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Solution

The fourth proportional to 612.07, 917.70 and 246.40 is: 369.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.07 : 917.70 = 246.40 : x
  2. Step 2: Convert to fraction form
    612.07/917.70 = 246.40/x
  3. Step 3: Cross multiply
    612.07x = 917.70 × 246.40
  4. Step 4: Simplify right side
    612.07x = 226,121.28
  5. Step 5: Solve for x
    x = 226,121.28/612.07
  6. Step 6: Final answer
    x = 369.44

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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.