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Finding the Fourth Proportional to 520.18, 782.79 and 469.06

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Solution

The fourth proportional to 520.18, 782.79 and 469.06 is: 705.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    520.18 : 782.79 = 469.06 : x
  2. Step 2: Convert to fraction form
    520.18/782.79 = 469.06/x
  3. Step 3: Cross multiply
    520.18x = 782.79 × 469.06
  4. Step 4: Simplify right side
    520.18x = 367,175.48
  5. Step 5: Solve for x
    x = 367,175.48/520.18
  6. Step 6: Final answer
    x = 705.86

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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.