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Finding the Fourth Proportional to 541.76, 811.62 and 433.28

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Solution

The fourth proportional to 541.76, 811.62 and 433.28 is: 649.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    541.76 : 811.62 = 433.28 : x
  2. Step 2: Convert to fraction form
    541.76/811.62 = 433.28/x
  3. Step 3: Cross multiply
    541.76x = 811.62 × 433.28
  4. Step 4: Simplify right side
    541.76x = 351,660.74
  5. Step 5: Solve for x
    x = 351,660.74/541.76
  6. Step 6: Final answer
    x = 649.11

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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.