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Finding the Fourth Proportional to 1,813.18, 2,502.18 and 985.18

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Solution

The fourth proportional to 1,813.18, 2,502.18 and 985.18 is: 1,359.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,813.18 : 2,502.18 = 985.18 : x
  2. Step 2: Convert to fraction form
    1,813.18/2,502.18 = 985.18/x
  3. Step 3: Cross multiply
    1,813.18x = 2,502.18 × 985.18
  4. Step 4: Simplify right side
    1,813.18x = 2,465,097.69
  5. Step 5: Solve for x
    x = 2,465,097.69/1,813.18
  6. Step 6: Final answer
    x = 1,359.54

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1.5x scale

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.