Home / 2,490.96-3,437.60-1,428.88

Finding the Fourth Proportional to 2,490.96, 3,437.60 and 1,428.88

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Solution

The fourth proportional to 2,490.96, 3,437.60 and 1,428.88 is: 1,971.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,490.96 : 3,437.60 = 1,428.88 : x
  2. Step 2: Convert to fraction form
    2,490.96/3,437.60 = 1,428.88/x
  3. Step 3: Cross multiply
    2,490.96x = 3,437.60 × 1,428.88
  4. Step 4: Simplify right side
    2,490.96x = 4,911,917.89
  5. Step 5: Solve for x
    x = 4,911,917.89/2,490.96
  6. Step 6: Final answer
    x = 1,971.90

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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.