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Finding the Fourth Proportional to 577.51, 797.50 and 421.05

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Solution

The fourth proportional to 577.51, 797.50 and 421.05 is: 581.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    577.51 : 797.50 = 421.05 : x
  2. Step 2: Convert to fraction form
    577.51/797.50 = 421.05/x
  3. Step 3: Cross multiply
    577.51x = 797.50 × 421.05
  4. Step 4: Simplify right side
    577.51x = 335,787.38
  5. Step 5: Solve for x
    x = 335,787.38/577.51
  6. Step 6: Final answer
    x = 581.44

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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.