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Finding the Fourth Proportional to 540, 805.51 and 531.08

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Solution

The fourth proportional to 540, 805.51 and 531.08 is: 792.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    540 : 805.51 = 531.08 : x
  2. Step 2: Convert to fraction form
    540/805.51 = 531.08/x
  3. Step 3: Cross multiply
    540x = 805.51 × 531.08
  4. Step 4: Simplify right side
    540x = 427,792.17
  5. Step 5: Solve for x
    x = 427,792.17/540
  6. Step 6: Final answer
    x = 792.21

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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.