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Finding the Fourth Proportional to 585.15, 807.48 and 388.32

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Solution

The fourth proportional to 585.15, 807.48 and 388.32 is: 535.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    585.15 : 807.48 = 388.32 : x
  2. Step 2: Convert to fraction form
    585.15/807.48 = 388.32/x
  3. Step 3: Cross multiply
    585.15x = 807.48 × 388.32
  4. Step 4: Simplify right side
    585.15x = 313,560.63
  5. Step 5: Solve for x
    x = 313,560.63/585.15
  6. Step 6: Final answer
    x = 535.86

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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.