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Finding the Fourth Proportional to 583.51, 806.39 and 478.43

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Solution

The fourth proportional to 583.51, 806.39 and 478.43 is: 661.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    583.51 : 806.39 = 478.43 : x
  2. Step 2: Convert to fraction form
    583.51/806.39 = 478.43/x
  3. Step 3: Cross multiply
    583.51x = 806.39 × 478.43
  4. Step 4: Simplify right side
    583.51x = 385,801.17
  5. Step 5: Solve for x
    x = 385,801.17/583.51
  6. Step 6: Final answer
    x = 661.17

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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.