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Finding the Fourth Proportional to 521.04, 782.28 and 277.68

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Solution

The fourth proportional to 521.04, 782.28 and 277.68 is: 416.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    521.04 : 782.28 = 277.68 : x
  2. Step 2: Convert to fraction form
    521.04/782.28 = 277.68/x
  3. Step 3: Cross multiply
    521.04x = 782.28 × 277.68
  4. Step 4: Simplify right side
    521.04x = 217,223.51
  5. Step 5: Solve for x
    x = 217,223.51/521.04
  6. Step 6: Final answer
    x = 416.90

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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.