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Finding the Fourth Proportional to 584.55, 805.82 and 387.72

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Solution

The fourth proportional to 584.55, 805.82 and 387.72 is: 534.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    584.55 : 805.82 = 387.72 : x
  2. Step 2: Convert to fraction form
    584.55/805.82 = 387.72/x
  3. Step 3: Cross multiply
    584.55x = 805.82 × 387.72
  4. Step 4: Simplify right side
    584.55x = 312,430.59
  5. Step 5: Solve for x
    x = 312,430.59/584.55
  6. Step 6: Final answer
    x = 534.48

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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.