Home / 1,545.20-2,133.08-986.44

Finding the Fourth Proportional to 1,545.20, 2,133.08 and 986.44

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Solution

The fourth proportional to 1,545.20, 2,133.08 and 986.44 is: 1,361.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,545.20 : 2,133.08 = 986.44 : x
  2. Step 2: Convert to fraction form
    1,545.20/2,133.08 = 986.44/x
  3. Step 3: Cross multiply
    1,545.20x = 2,133.08 × 986.44
  4. Step 4: Simplify right side
    1,545.20x = 2,104,155.44
  5. Step 5: Solve for x
    x = 2,104,155.44/1,545.20
  6. Step 6: Final answer
    x = 1,361.74

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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.