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Finding the Fourth Proportional to 563.15, 843.35 and 389.36

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Solution

The fourth proportional to 563.15, 843.35 and 389.36 is: 583.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    563.15 : 843.35 = 389.36 : x
  2. Step 2: Convert to fraction form
    563.15/843.35 = 389.36/x
  3. Step 3: Cross multiply
    563.15x = 843.35 × 389.36
  4. Step 4: Simplify right side
    563.15x = 328,363.51
  5. Step 5: Solve for x
    x = 328,363.51/563.15
  6. Step 6: Final answer
    x = 583.08

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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.