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Finding the Fourth Proportional to 580.84, 869.58 and 388.12

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Solution

The fourth proportional to 580.84, 869.58 and 388.12 is: 581.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    580.84 : 869.58 = 388.12 : x
  2. Step 2: Convert to fraction form
    580.84/869.58 = 388.12/x
  3. Step 3: Cross multiply
    580.84x = 869.58 × 388.12
  4. Step 4: Simplify right side
    580.84x = 337,501.39
  5. Step 5: Solve for x
    x = 337,501.39/580.84
  6. Step 6: Final answer
    x = 581.06

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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.