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Finding the Fourth Proportional to 621.20, 926.72 and 577.01

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Solution

The fourth proportional to 621.20, 926.72 and 577.01 is: 860.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.20 : 926.72 = 577.01 : x
  2. Step 2: Convert to fraction form
    621.20/926.72 = 577.01/x
  3. Step 3: Cross multiply
    621.20x = 926.72 × 577.01
  4. Step 4: Simplify right side
    621.20x = 534,719.19
  5. Step 5: Solve for x
    x = 534,719.19/621.20
  6. Step 6: Final answer
    x = 860.79

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.