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Finding the Fourth Proportional to 585.36, 807.57 and 388.62

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Solution

The fourth proportional to 585.36, 807.57 and 388.62 is: 536.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    585.36 : 807.57 = 388.62 : x
  2. Step 2: Convert to fraction form
    585.36/807.57 = 388.62/x
  3. Step 3: Cross multiply
    585.36x = 807.57 × 388.62
  4. Step 4: Simplify right side
    585.36x = 313,837.85
  5. Step 5: Solve for x
    x = 313,837.85/585.36
  6. Step 6: Final answer
    x = 536.15

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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.