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Finding the Fourth Proportional to 1,240.84, 1,861.80 and 591.76

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Solution

The fourth proportional to 1,240.84, 1,861.80 and 591.76 is: 887.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,240.84 : 1,861.80 = 591.76 : x
  2. Step 2: Convert to fraction form
    1,240.84/1,861.80 = 591.76/x
  3. Step 3: Cross multiply
    1,240.84x = 1,861.80 × 591.76
  4. Step 4: Simplify right side
    1,240.84x = 1,101,738.77
  5. Step 5: Solve for x
    x = 1,101,738.77/1,240.84
  6. Step 6: Final answer
    x = 887.90

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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.