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Finding the Fourth Proportional to 540.84, 810.75 and 387.03

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Solution

The fourth proportional to 540.84, 810.75 and 387.03 is: 580.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    540.84 : 810.75 = 387.03 : x
  2. Step 2: Convert to fraction form
    540.84/810.75 = 387.03/x
  3. Step 3: Cross multiply
    540.84x = 810.75 × 387.03
  4. Step 4: Simplify right side
    540.84x = 313,784.57
  5. Step 5: Solve for x
    x = 313,784.57/540.84
  6. Step 6: Final answer
    x = 580.18

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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.