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Finding the Fourth Proportional to 581.80, 872.70 and 556.60

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Solution

The fourth proportional to 581.80, 872.70 and 556.60 is: 834.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    581.80 : 872.70 = 556.60 : x
  2. Step 2: Convert to fraction form
    581.80/872.70 = 556.60/x
  3. Step 3: Cross multiply
    581.80x = 872.70 × 556.60
  4. Step 4: Simplify right side
    581.80x = 485,744.82
  5. Step 5: Solve for x
    x = 485,744.82/581.80
  6. Step 6: Final answer
    x = 834.90

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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.