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Finding the Fourth Proportional to 612.36, 917.50 and 395.47

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Solution

The fourth proportional to 612.36, 917.50 and 395.47 is: 592.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.36 : 917.50 = 395.47 : x
  2. Step 2: Convert to fraction form
    612.36/917.50 = 395.47/x
  3. Step 3: Cross multiply
    612.36x = 917.50 × 395.47
  4. Step 4: Simplify right side
    612.36x = 362,843.73
  5. Step 5: Solve for x
    x = 362,843.73/612.36
  6. Step 6: Final answer
    x = 592.53

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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.