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Finding the Fourth Proportional to 585.41, 807.20 and 399.01

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Solution

The fourth proportional to 585.41, 807.20 and 399.01 is: 550.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    585.41 : 807.20 = 399.01 : x
  2. Step 2: Convert to fraction form
    585.41/807.20 = 399.01/x
  3. Step 3: Cross multiply
    585.41x = 807.20 × 399.01
  4. Step 4: Simplify right side
    585.41x = 322,082.11
  5. Step 5: Solve for x
    x = 322,082.11/585.41
  6. Step 6: Final answer
    x = 550.18

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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.