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Finding the Fourth Proportional to 1,240.94, 1,861.85 and 510.57

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Solution

The fourth proportional to 1,240.94, 1,861.85 and 510.57 is: 766.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,240.94 : 1,861.85 = 510.57 : x
  2. Step 2: Convert to fraction form
    1,240.94/1,861.85 = 510.57/x
  3. Step 3: Cross multiply
    1,240.94x = 1,861.85 × 510.57
  4. Step 4: Simplify right side
    1,240.94x = 950,606.03
  5. Step 5: Solve for x
    x = 950,606.03/1,240.94
  6. Step 6: Final answer
    x = 766.04

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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.