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Finding the Fourth Proportional to 521.19, 783.23 and 277.92

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Solution

The fourth proportional to 521.19, 783.23 and 277.92 is: 417.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    521.19 : 783.23 = 277.92 : x
  2. Step 2: Convert to fraction form
    521.19/783.23 = 277.92/x
  3. Step 3: Cross multiply
    521.19x = 783.23 × 277.92
  4. Step 4: Simplify right side
    521.19x = 217,673.89
  5. Step 5: Solve for x
    x = 217,673.89/521.19
  6. Step 6: Final answer
    x = 417.65

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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.