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Finding the Fourth Proportional to 617.80, 852.18 and 369.16

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Solution

The fourth proportional to 617.80, 852.18 and 369.16 is: 509.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    617.80 : 852.18 = 369.16 : x
  2. Step 2: Convert to fraction form
    617.80/852.18 = 369.16/x
  3. Step 3: Cross multiply
    617.80x = 852.18 × 369.16
  4. Step 4: Simplify right side
    617.80x = 314,590.77
  5. Step 5: Solve for x
    x = 314,590.77/617.80
  6. Step 6: Final answer
    x = 509.21

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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.