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Finding the Fourth Proportional to 581.99, 871.57 and 561.04

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Solution

The fourth proportional to 581.99, 871.57 and 561.04 is: 840.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    581.99 : 871.57 = 561.04 : x
  2. Step 2: Convert to fraction form
    581.99/871.57 = 561.04/x
  3. Step 3: Cross multiply
    581.99x = 871.57 × 561.04
  4. Step 4: Simplify right side
    581.99x = 488,982.05
  5. Step 5: Solve for x
    x = 488,982.05/581.99
  6. Step 6: Final answer
    x = 840.19

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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.