Home / 2,825.40-3,898.72-1,646.40

Finding the Fourth Proportional to 2,825.40, 3,898.72 and 1,646.40

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Solution

The fourth proportional to 2,825.40, 3,898.72 and 1,646.40 is: 2,271.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,825.40 : 3,898.72 = 1,646.40 : x
  2. Step 2: Convert to fraction form
    2,825.40/3,898.72 = 1,646.40/x
  3. Step 3: Cross multiply
    2,825.40x = 3,898.72 × 1,646.40
  4. Step 4: Simplify right side
    2,825.40x = 6,418,852.61
  5. Step 5: Solve for x
    x = 6,418,852.61/2,825.40
  6. Step 6: Final answer
    x = 2,271.84

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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.