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Finding the Fourth Proportional to 585.78, 808.45 and 445.65

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Solution

The fourth proportional to 585.78, 808.45 and 445.65 is: 615.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    585.78 : 808.45 = 445.65 : x
  2. Step 2: Convert to fraction form
    585.78/808.45 = 445.65/x
  3. Step 3: Cross multiply
    585.78x = 808.45 × 445.65
  4. Step 4: Simplify right side
    585.78x = 360,284.63
  5. Step 5: Solve for x
    x = 360,284.63/585.78
  6. Step 6: Final answer
    x = 615.05

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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.