Home / 1,406.40-2,106.64-828.96

Finding the Fourth Proportional to 1,406.40, 2,106.64 and 828.96

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Solution

The fourth proportional to 1,406.40, 2,106.64 and 828.96 is: 1,241.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,406.40 : 2,106.64 = 828.96 : x
  2. Step 2: Convert to fraction form
    1,406.40/2,106.64 = 828.96/x
  3. Step 3: Cross multiply
    1,406.40x = 2,106.64 × 828.96
  4. Step 4: Simplify right side
    1,406.40x = 1,746,320.29
  5. Step 5: Solve for x
    x = 1,746,320.29/1,406.40
  6. Step 6: Final answer
    x = 1,241.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.