Home / 1,728.18-2,385.18-1,029.69

Finding the Fourth Proportional to 1,728.18, 2,385.18 and 1,029.69

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Solution

The fourth proportional to 1,728.18, 2,385.18 and 1,029.69 is: 1,421.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,728.18 : 2,385.18 = 1,029.69 : x
  2. Step 2: Convert to fraction form
    1,728.18/2,385.18 = 1,029.69/x
  3. Step 3: Cross multiply
    1,728.18x = 2,385.18 × 1,029.69
  4. Step 4: Simplify right side
    1,728.18x = 2,455,995.99
  5. Step 5: Solve for x
    x = 2,455,995.99/1,728.18
  6. Step 6: Final answer
    x = 1,421.15

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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.