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Finding the Fourth Proportional to 585.19, 807.55 and 319.64

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Solution

The fourth proportional to 585.19, 807.55 and 319.64 is: 441.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    585.19 : 807.55 = 319.64 : x
  2. Step 2: Convert to fraction form
    585.19/807.55 = 319.64/x
  3. Step 3: Cross multiply
    585.19x = 807.55 × 319.64
  4. Step 4: Simplify right side
    585.19x = 258,120.45
  5. Step 5: Solve for x
    x = 258,120.45/585.19
  6. Step 6: Final answer
    x = 441.09

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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.