Home / 3,125.80-4,312.98-1,728.28

Finding the Fourth Proportional to 3,125.80, 4,312.98 and 1,728.28

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Solution

The fourth proportional to 3,125.80, 4,312.98 and 1,728.28 is: 2,384.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,125.80 : 4,312.98 = 1,728.28 : x
  2. Step 2: Convert to fraction form
    3,125.80/4,312.98 = 1,728.28/x
  3. Step 3: Cross multiply
    3,125.80x = 4,312.98 × 1,728.28
  4. Step 4: Simplify right side
    3,125.80x = 7,454,037.07
  5. Step 5: Solve for x
    x = 7,454,037.07/3,125.80
  6. Step 6: Final answer
    x = 2,384.68

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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.