Home / 1,288,175.80-1,932,263.70-813,321.40

Finding the Fourth Proportional to 1,288,175.80, 1,932,263.70 and 813,321.40

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Solution

The fourth proportional to 1,288,175.80, 1,932,263.70 and 813,321.40 is: 1,219,982.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,288,175.80 : 1,932,263.70 = 813,321.40 : x
  2. Step 2: Convert to fraction form
    1,288,175.80/1,932,263.70 = 813,321.40/x
  3. Step 3: Cross multiply
    1,288,175.80x = 1,932,263.70 × 813,321.40
  4. Step 4: Simplify right side
    1,288,175.80x = 1,571,551,417,653.18
  5. Step 5: Solve for x
    x = 1,571,551,417,653.18/1,288,175.80
  6. Step 6: Final answer
    x = 1,219,982.10

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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.