Home / 1,216,428.80-1,821,878.40-768,531.20

Finding the Fourth Proportional to 1,216,428.80, 1,821,878.40 and 768,531.20

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Solution

The fourth proportional to 1,216,428.80, 1,821,878.40 and 768,531.20 is: 1,151,050.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,216,428.80 : 1,821,878.40 = 768,531.20 : x
  2. Step 2: Convert to fraction form
    1,216,428.80/1,821,878.40 = 768,531.20/x
  3. Step 3: Cross multiply
    1,216,428.80x = 1,821,878.40 × 768,531.20
  4. Step 4: Simplify right side
    1,216,428.80x = 1,400,170,393,006.08
  5. Step 5: Solve for x
    x = 1,400,170,393,006.08/1,216,428.80
  6. Step 6: Final answer
    x = 1,151,050.02

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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.