Home / 1,485.38-2,223.20-1,117.64

Finding the Fourth Proportional to 1,485.38, 2,223.20 and 1,117.64

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Solution

The fourth proportional to 1,485.38, 2,223.20 and 1,117.64 is: 1,672.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,485.38 : 2,223.20 = 1,117.64 : x
  2. Step 2: Convert to fraction form
    1,485.38/2,223.20 = 1,117.64/x
  3. Step 3: Cross multiply
    1,485.38x = 2,223.20 × 1,117.64
  4. Step 4: Simplify right side
    1,485.38x = 2,484,737.25
  5. Step 5: Solve for x
    x = 2,484,737.25/1,485.38
  6. Step 6: Final answer
    x = 1,672.80

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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.