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Finding the Fourth Proportional to 643.16, 889.05 and 573.90

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Solution

The fourth proportional to 643.16, 889.05 and 573.90 is: 793.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    643.16 : 889.05 = 573.90 : x
  2. Step 2: Convert to fraction form
    643.16/889.05 = 573.90/x
  3. Step 3: Cross multiply
    643.16x = 889.05 × 573.90
  4. Step 4: Simplify right side
    643.16x = 510,228.00
  5. Step 5: Solve for x
    x = 510,228.00/643.16
  6. Step 6: Final answer
    x = 793.32

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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.