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Finding the Fourth Proportional to 562.95, 843.62 and 389.21

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Solution

The fourth proportional to 562.95, 843.62 and 389.21 is: 583.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    562.95 : 843.62 = 389.21 : x
  2. Step 2: Convert to fraction form
    562.95/843.62 = 389.21/x
  3. Step 3: Cross multiply
    562.95x = 843.62 × 389.21
  4. Step 4: Simplify right side
    562.95x = 328,339.18
  5. Step 5: Solve for x
    x = 328,339.18/562.95
  6. Step 6: Final answer
    x = 583.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.