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Finding the Fourth Proportional to 583.96, 805.90 and 387.84

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Solution

The fourth proportional to 583.96, 805.90 and 387.84 is: 535.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    583.96 : 805.90 = 387.84 : x
  2. Step 2: Convert to fraction form
    583.96/805.90 = 387.84/x
  3. Step 3: Cross multiply
    583.96x = 805.90 × 387.84
  4. Step 4: Simplify right side
    583.96x = 312,560.26
  5. Step 5: Solve for x
    x = 312,560.26/583.96
  6. Step 6: Final answer
    x = 535.24

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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.