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Finding the Fourth Proportional to 566.80, 781.98 and 419.68

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Solution

The fourth proportional to 566.80, 781.98 and 419.68 is: 579.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    566.80 : 781.98 = 419.68 : x
  2. Step 2: Convert to fraction form
    566.80/781.98 = 419.68/x
  3. Step 3: Cross multiply
    566.80x = 781.98 × 419.68
  4. Step 4: Simplify right side
    566.80x = 328,181.37
  5. Step 5: Solve for x
    x = 328,181.37/566.80
  6. Step 6: Final answer
    x = 579.01

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.