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Finding the Fourth Proportional to 1,054.80, 1,579.32 and 540.72

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Solution

The fourth proportional to 1,054.80, 1,579.32 and 540.72 is: 809.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,054.80 : 1,579.32 = 540.72 : x
  2. Step 2: Convert to fraction form
    1,054.80/1,579.32 = 540.72/x
  3. Step 3: Cross multiply
    1,054.80x = 1,579.32 × 540.72
  4. Step 4: Simplify right side
    1,054.80x = 853,969.91
  5. Step 5: Solve for x
    x = 853,969.91/1,054.80
  6. Step 6: Final answer
    x = 809.60

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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.