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Finding the Fourth Proportional to 1,461.83, 2,187.20 and 813.02

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Solution

The fourth proportional to 1,461.83, 2,187.20 and 813.02 is: 1,216.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,461.83 : 2,187.20 = 813.02 : x
  2. Step 2: Convert to fraction form
    1,461.83/2,187.20 = 813.02/x
  3. Step 3: Cross multiply
    1,461.83x = 2,187.20 × 813.02
  4. Step 4: Simplify right side
    1,461.83x = 1,778,228.44
  5. Step 5: Solve for x
    x = 1,778,228.44/1,461.83
  6. Step 6: Final answer
    x = 1,216.44

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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.