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Finding the Fourth Proportional to 579.96, 870.03 and 214.79

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Solution

The fourth proportional to 579.96, 870.03 and 214.79 is: 322.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    579.96 : 870.03 = 214.79 : x
  2. Step 2: Convert to fraction form
    579.96/870.03 = 214.79/x
  3. Step 3: Cross multiply
    579.96x = 870.03 × 214.79
  4. Step 4: Simplify right side
    579.96x = 186,869.39
  5. Step 5: Solve for x
    x = 186,869.39/579.96
  6. Step 6: Final answer
    x = 322.21

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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.