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Finding the Fourth Proportional to 540.09, 809.73 and 385.99

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Solution

The fourth proportional to 540.09, 809.73 and 385.99 is: 578.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    540.09 : 809.73 = 385.99 : x
  2. Step 2: Convert to fraction form
    540.09/809.73 = 385.99/x
  3. Step 3: Cross multiply
    540.09x = 809.73 × 385.99
  4. Step 4: Simplify right side
    540.09x = 312,547.68
  5. Step 5: Solve for x
    x = 312,547.68/540.09
  6. Step 6: Final answer
    x = 578.70

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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.