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Finding the Fourth Proportional to 1,782.61, 2,459.97 and 985.91

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Solution

The fourth proportional to 1,782.61, 2,459.97 and 985.91 is: 1,360.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,782.61 : 2,459.97 = 985.91 : x
  2. Step 2: Convert to fraction form
    1,782.61/2,459.97 = 985.91/x
  3. Step 3: Cross multiply
    1,782.61x = 2,459.97 × 985.91
  4. Step 4: Simplify right side
    1,782.61x = 2,425,296.72
  5. Step 5: Solve for x
    x = 2,425,296.72/1,782.61
  6. Step 6: Final answer
    x = 1,360.53

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.