Home / 1,728.30-2,582.70-1,242.30

Finding the Fourth Proportional to 1,728.30, 2,582.70 and 1,242.30

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Solution

The fourth proportional to 1,728.30, 2,582.70 and 1,242.30 is: 1,856.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,728.30 : 2,582.70 = 1,242.30 : x
  2. Step 2: Convert to fraction form
    1,728.30/2,582.70 = 1,242.30/x
  3. Step 3: Cross multiply
    1,728.30x = 2,582.70 × 1,242.30
  4. Step 4: Simplify right side
    1,728.30x = 3,208,488.21
  5. Step 5: Solve for x
    x = 3,208,488.21/1,728.30
  6. Step 6: Final answer
    x = 1,856.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.