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Finding the Fourth Proportional to 617.57, 851.95 and 368.75

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Solution

The fourth proportional to 617.57, 851.95 and 368.75 is: 508.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    617.57 : 851.95 = 368.75 : x
  2. Step 2: Convert to fraction form
    617.57/851.95 = 368.75/x
  3. Step 3: Cross multiply
    617.57x = 851.95 × 368.75
  4. Step 4: Simplify right side
    617.57x = 314,159.15
  5. Step 5: Solve for x
    x = 314,159.15/617.57
  6. Step 6: Final answer
    x = 508.70

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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.