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Finding the Fourth Proportional to 1,869.57, 2,805.12 and 992.07

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Solution

The fourth proportional to 1,869.57, 2,805.12 and 992.07 is: 1,488.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,869.57 : 2,805.12 = 992.07 : x
  2. Step 2: Convert to fraction form
    1,869.57/2,805.12 = 992.07/x
  3. Step 3: Cross multiply
    1,869.57x = 2,805.12 × 992.07
  4. Step 4: Simplify right side
    1,869.57x = 2,782,875.40
  5. Step 5: Solve for x
    x = 2,782,875.40/1,869.57
  6. Step 6: Final answer
    x = 1,488.51

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1.5x scale

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.